The USSR failed when it stopped being socialist in the 1980s, through a process that began in the late 1950s:
I've attached a copy of the book "Socialism Betrayed" in PDF format to this post, plus Harpal Brar's "Perestroika".
Soviet government officials made the mistake of trying to appease the United States with the hope of ending the Cold War and establishing peaceful co-existence. That Soviet miscalculation proved to be catastrophic to its economy. Socialism nonetheless proved to be a very effective system of production able to industrialize a nation much quicker than capitalism and meet the needs of its citizens. The USSR was constantly at war with capitalist powers, starting from its very beginning, it was invaded by over a dozen capitalist European nations, including 7000 US Marines, in 1918, right after WW1. The invasion failed and Soviet Russia continued to develop itself into an industrial juggernaut rivaling the United States. By the late 1930s, it was more mechanized in its agriculture than the United States and one of the world's top producers of steel. Soviet Russia by the late 1930s was one of the most industrialized nations on Earth, with thousands of factories, worker cooperatives, hundreds of mining operations, and foundries.
The United States had over 120 years of a headstart on the Soviet Union as far as its industrialization and building its economy. Despite this, and the devastation caused by WW2 (being invaded by four million Germans), the destruction of most of its national infrastructure, and the death of 27 million Soviets, the USSR in less than ten years was able to once again, become a world superpower rivaling the US. Russia went from being one of the poorest nations in Europe to an industrial giant with the second largest economy in the world, and a military feared by the United States and its allies. Nonetheless, the further away from socialism the Soviet Union went, the less secure and powerful it became until it fully collapsed in 1991.
Your critique and snide remarks are disingenuous for the following reasons:
#1: You ignore the context of where the Soviet Union came from before the 1917 revolution,
#2: You conveniently ignore its geopolitical situation and challenges, with all of the wars and enemies that it had, trying desperately to destroy it by whatever means they could. Through economic sanctions, wars, cold wars, causing internal conflicts within the Soviet government..etc.
#3: You ignore all of its great accomplishments both economically and in the area of science and technology.
#4: Why do you assume that if socialism is better than capitalism, it has to replace it immediately, overnight, or within a few years? It took centuries for capitalism to replace slavery and feudalism, and it has taken more than a century for socialism to take root and begin replacing capitalism. You're being unfair and unreasonable when you make such demands of socialism.
Karl Marx admits to the superiority and virtues of capitalism, over previous economic systems, like slavery and feudalism. But just like capitalism replaced previous systems of production, capitalism will likewise be replaced with a socialized and democratized mode of production, namely, socialism and later communism. Why? Technology:
Advanced 21st-century technology (robotics, automated systems, artificial intelligence, self-driving vehicles, nanotechnology.etc) will necessitate the adoption of a socialist economy, that produces and delivers goods and services to consumers without wage labor or for a profit. The bottom line of capitalist production must change from the private pursuit of money (i.e. capital), to pursuing production for the purpose of meeting human needs. Technology is going to eliminate wage labor to such an extent that society will have to establish a new and better mode of production that doesn't rely on wage labor. That's called socialism, the process that leads to communism. You may not like that fact, but that's the inevitable consequence of advanced production technology. The need for wage labor is eliminated by the capitalists themselves, creating what they're calling a "tech apocalypse". Why do you think these billionaires are talking about giving everyone a "Universal Basic Income"? They see the writing on the wall for capitalism.
NO WAGE LABOR (OR NOT ENOUGH OF IT) = NO PAYING CONSUMERS (OR NOT ENOUGH CUSTOMERS DUE TO EXTREME UNEMPLOYMENT) = NO MARKETS (OR TOO SMALL OF A MARKET WORTH INVESTING IN) = NO CAPITALISM = MUST PRODUCE PRODUCTS TO MEET HUMAN NEEDS, RATHER THAN FOR A PROFIT (SOCIALISM AND COMMUNISM).
Read the book
"Fully Automated Luxury Communism" by Aaron Bastani
Socialism is the future, due to advanced technology, which eliminates wage labor.