I mirrored your comment, because I think it works backwards. From the way it sounds to me, you started with your conclusion/opinion and searched for proof of why it is right. Real socialism and the Soviet unions were deeply, deeply flawed systems from the start, but only because some implementations failed, due to essentially the same problems as capitalism, does not mean the idea as a whole is rubbish. If you read the communist manifesto and “the capital” from Karl Marx and Friedrich Engels, you will read a brilliant critique of our modern contemporary system. There are some very fine ideas in there, and I think it’s dangerous to discard another perspective because some implementations have failed. The USA are the living proof of how two radically different systems can suffer from the same problems and collapse because of them. Why is it such a culture war against some genuinely very fine points that Karl Marx and Friedrich Engels have made over a hundred years ago, which are relevant to this day?

Edit: typo. I apologise for forgetting about Friedrich Engels.