You're just ignoring all of the points I made. First of all, you assume that if a new economic system and mode of production is ever going to replace capitalism, it has to do it overnight, without ever failing. There's no trial and error, there's no opportunity to learn from our mistakes and modify something we've missed or inaccurately, incorrectly applied, or shouldn't have included in the effort or equation. For you, unfortunately, either it works immediately, under all conditions, always, or it's worthless and should be thrown in the trash bin, never to be considered again as a viable alternative to capitalism.
Well, capitalism itself didn't replace slavery or feudalism overnight, it took centuries, before the merchants, became industrialists and completely dominated the kings and nobles, the slavemasters, and feudal lords. It didn't occur overnight, it took time and new technology, for capitalism to eventually become the world's primary economic system and mode of production. Why can't the process of evolution, that took place in capitalism's development and expansion, apply to socialism and communism? Why do you demand from socialism and communism, a condition that was never present or applied to capitalism? Why is the standard or metric so much higher for socialism than for capitalism? Maybe it's because you have a misconception about what socialism entails and you're afraid of it. Do you think we communists are going to foolishly show up on your doorstep armed with AK47s and try to take your stuff away, including your home? No, not at all, that's wrong, unnecessary and we're Americans. Our communism is an American form of communism, not Russian, Chinese, or Cuban..etc.
There are a lot of misconceptions about communism in America due to cold war propaganda.
More, you ignore the fact that every single socialist project, on a national scale, has been viciously, ruthlessly assaulted by powerful capitalist countries like the United States empire, along with all of its capitalist allies. A country that adopts socialism and identifies as Marxist, is like a little flower growing in a field of weeds that want to strangle it. The capitalist ruling class in every capitalist-run economy is going to fight to destroy that nation, by bribing their politicians to impose economic sanctions upon that young socialist nation and even start a shooting war. That's the reality of the situation for Marxist economies, especially countries that openly admit that they are communists. Such countries are in for a serious conflict, a fight, with the United States and its allies. So you can't ignore that , you have to factor that in to the equation, when assessing whether these Marxist nations are "successful" or not.
Right after WW1, the United States with 14 other countries invaded Russia to stop the Bolshevic, socialist revolution and they failed. Socialism turned an under-industrialized agrarian society populated mostly by illiterate, impoverished peasants, into an industrial and scientific, technological, juggernaut and world power in less than twenty years, by the late 1930s. Soviet Russia industrialized in less than 20 years, something that took other nations in the West, including the United States over a century to accomplish. The US had 120+ years of industrialization or "headstart", on Soviet Russia. You either conveniently ignore that, or you're just not aware of it. If we're running a race, and you begin running way before me, how can you expect us to be "at par", running near each other? I'm going to be compared to you? That's the metric of success? I'm 9 years old, benching 125 pounds, that's not bad at all. You're 19, benching 350 pounds. I'm bad at the bench? You're much better than me? Well yeah, but I'm 9 and you're 19.
In 1941 the Soviet Union was invaded by 4 million Nazis. The most advanced and powerful army in the world at the time invaded Soviet Russia, and as a result, nine million Soviet soldiers died and seventeen million Russian civilians. About a quarter of their population died as a result of the war. That's the equivalent of the US losing 60 million people. You know how many Americans we lost in WW2? Half a million. We didn't get invaded by four million Germans, they did. In less than 12 years after WW2, the Soviets rebuilt their infrastructure and were launching rockets into space. They became a superpower in the 1950s, rivaling the United States, economically, politically, militarily, and technologically. You're going to ignore that? Really? Is that an honest assessment of socialism in the Soviet Union and socialism in general? Just ignore its accomplishments. That's what Western cold war propaganda attempted to do, essentially ignore everything good about socialism and the USSR and demonize it as much as possible.
"THE RED SCARE"
The last thing wealthy capitalists in the United States and Western Europe wanted was for their employees to "contract" a serious case of socialism, infecting the working class of their countries with the " The Red Bug". They were horrified. That's why they fought socialism, tooth, and nail around the world, to destroy it and they used the working class to do it. It wasn't rich American kids fighting in Vietnam, it was the kids of the American working class. Trump, Bush jr, and most other rich kids got a pass from the draft. The wealthy hardly ever send their kids to fight in the front lines as infantry grunts, it's the working class that does the hard, dirty work. The boots on the ground belong to working-class people. You and I pay for the cost of empire, not the rich.
Why did the Soviet experiment fail? It began to fall apart after the death of Stalin, in the late 1950s, when the fifth column of revisionists and right-wingers in the Soviet communist party, rejected Stalinism (a strict form of Marxism and Leninism) and tried to create a more "affable", friendlier type of socialism, for the sake of ending the cold war.
They would slowly introduce markets and become more compatible with their arch-rival, the US, a nuclear power. There was no arms race, between the USA and the USSR, it was an arms chase. The Soviets didn't want to continue fighting a cold war, spending a large % of its resources on defense. Socialists, we want to spend money on infrastructure, and social programs, not allocate a large, significant portion of our resources into the military. But we have to, because we're that "little flower", growing in a hazardous field of powerful capitalist weeds that want to kill us. We have to militarize and centralize authority, reduce democracy, and become more authoritarian in order to survive. KGB..etc. If America adopts socialism, it won't have to worry about the weeds, because it was the primary weed, when it was capitalist. It was once
LORD OF THE WEEDS. Once the Lord Of The Weeds, becomes socialist, all of the other weeds die. They can't touch us, hence we can be more democratic.
Socialism has a government and state, centrally planning production and the economy in general, in cooperation with democratically run worker-cooperatives. There's both a top-down and bottom-up interaction in the rational, practical central planning of production and the economy. Advanced technology will allow this to occur without much strain or need for human analysis and accounting. We have powerful computers and automated systems of storage and distribution, that will do the accounting and guide us as to what and how much we need to produce to meet consumption demands.
We don't have to worry about the loss of jobs due to technology because as modern communists we don't rely on wages to produce what we consume, we rely on advanced 21st-century technology and human unwaged labor (until technology permits us to completely eliminate all human labor/drudgery). So we are progressive when it comes to science and technology, we don't fear the negative economic impact of technology eliminating wage labor, because we don't rely on wage labor or monetary gain, or markets, to produce what we consume. Advanced technology that replaces human labor (drudgery), is sought and pursued, in order to free human beings from having to work "jobs", and allow people to do what they want with their lives, working in that which imbues their lives with meaning, adventure, glory, happiness..etc. Are you an artist, an explorer, a scientist, a teacher, a writer, or an organizer who establishes new space colonies, what and who are you? You'll have the power, time, and resources to decide such things for yourself. That's the modern world that American communists want to create. Capitalism is obsolete, we need to transcend it and move forward into a socialized, democratized and more personalized mode of production, namely modern, American, freedom-loving communism.