You're just unable to think deeply, so you resort to cheap, irrational, baby-brained arguments. Is there a straight, pure capitalist system? No. The poorest countries in the world aren't socialist, they're capitalist.
The countries that openly identify as socialist, are often attacked by the US capitalist empire (The 800-pound gorilla). Soviet Russia was invaded in 1918 by the United States, UK, France and 12 other countries. There were over 200K foreign troops in Soviet Russia, fighting on the side of the "White Army" (pro-tsarist/capitalist army), vs the Red Army (Socialists). The socialists won, and the invading forces had to leave.
Shortly after that, Soviet Russia was invaded by four million Germans! The Soviet Union lost 9 million soldiers and 18 million Soviet civilians, 14% of its population. Do you know how many Americans died in WW2? Not even half a million. The US lost 0.03% of its population. The US is surrounded by two vast oceans, that kept Germany and Japan from invading it.
The USSR had to pick itself up by its own bootstraps, after WW2, rebuilding its country from the catastrophe it suffered at the hands of the Nazis. There was no Marshal Plan from Uncle Sam for the Russians, they had to rebuild on their own and they still managed to become a World Superpower.
Russia was just a backwater, under-industrialized, agrarian society in 1917, and it became an industrial juggernaut and nuclear superpower, despite all of the challenges it had to overcome. The wars, the economic sanctions from the American capitalist empire, and the Cold War..etc.
You're so dishonest and unfair in your assessment of the socialist project of the 20th century. It was an amazing "go" or try, to establish a communist government and economy at the massive scale of Russia, with all of that territory. Despite all of the obstacles, it made some very impressive accomplishments.
Did capitalism replace feudalism and chattel slavery overnight? Did the European mercantile class, replace the royal aristocracy of Europe with one single swoop of their swords? One event, one war, one single victory, one try, one century..? No. It took hundreds of years before the European merchant class was in a position to replace feudalism and become capitalist industrialists. Technology had to exist, to allow the merchant classes to rise to dominance, to the point that they became the new ruling class. It took centuries and technology to achieve that.
We are now at the brink or edge of a new revolution in production. Advanced automation and artificial intelligence is going to eliminate wage labor, and when that occurs society is forced by necessity to adopt a non-profit, marketless system of mass production. In other words, it's forced due to the circumstances created by advanced automation and artificial intelligence to adopt marketless, high-tech, democratic socialism/communism.