It's a fair point, but there were quite a few countries (starting with China) that that refused Soviet influence (often, because they considered it not sufficie

It's a fair point, but there were quite a few countries (starting with China) that that refused Soviet influence (often, because they considered it not sufficiently communist) and went their own way. They didn't succeed at building the workers' paradise any better than USSR did. Communism does (well, can...) work just fine. Just not with the actual, real people that exist in this world.