If the only way to defend communism is by claiming that no country has ever done communism correctly, then that’s a problem. You can’t point to a single successful communist country because there aren’t any.
China became far more successful since it abandoned communism for its own flavor of capitalism. Private ownership in China has led to a massive improvement in quality of life for most Chinese residents, and more opportunities for success than ever before.
Meanwhile, most complaints about capitalism have almost nothing to do with capitalism and everything to do with laws and regulations or human greed (which is the worst part of any system).
Yeah, point to all the communist countries that failed with the US was relentlessly fucking with them despite the fact that “Communism will naturally fail if left to its own devices”
Pointing out greed as a problem of capitalism is valid when money is power and all decision making is based around profit.