State socialist experiments have not worked in the context of the capitalist world-system. But just because my car runs out of gas 10 miles to New York doesn't mean that I should throw my hands up in the air and pledge never to go to New York. Communism is a better world. Human beings create their worlds. And so we should set about creating a better one.
Capitalism is exploitation.
It is wage-slavery. It creates poverty and suffering. And it is immoral. That's all I have to say about that.