There will always be issues with human nature that any system will struggle with. Isn't practically every country today capitalist? Is everybody now living in a kind of paradise, if we are assuming that capitalism is the ideal system?

Isn't it a bit strange that we are always trying to force everybody into the same system, regardless of personal preferences? But the "system" of course is domination by some people over others, and what else would they want? Would they ever accept that some people may want to be left alone, free from their domination? The usual mainstream political discussion is only over what form of domination is preferable.