Not to nitpick but did you just say china and russia are bad because they make people suffer, then say never to deal in absolutes?
Absolutes in the sense of “they’re communist, they can’t be bad”. Ends don’t justify the means. America isn’t good because it’s “free” and “capitalist”. Russia isn’t good because it’s “strong” and “communist”.
People are assholes. Especially when they get the power to be assholes. A dogmatic easy system alone will not prevent that. This is a hard problem going all throughout human history.
You should read Animal Farm. It tackles the topic quite well.