It's tough posting things here on this subject because the definition of socialism, capitalism, communism, etc. are so varied that people talk past each other.

Personally, I am extremely anti-capitalist. It is a vile system that has killed more than any other political-economic system on Earth. But I am no longer pro-communistic. I was somewhat of a Marxist-Leninist-Maoist (I disagreed with enough core principles that I don't think I was one). Then Catholicism made me realize that the ends do not justify the means (so the revolutionary violence was not worth it) and that humans are fallen and will always corrupt the system. That doesn't change the fact that capitalism is vile, but now I have no system to replace it with. I just hope the Church can still do its mission, and more people reach Christ.