You do realise none of the examples you brought up are actual communism. Theyre all bad attempts that were taken advantage of.

The PRC and the USSR are and were real examples of Actually Existing Socialism. They absolutely ran into problems, and no Communist can simply look away and say they didn’t Communism hard enough. That goes directly against the Dialectical Materialist theory of knowledge.

The PRC and USSR also brought democratization, doubled life expectancies, 99%+ literacy rates, ended famine, and drastically reduced wealth inequality. As much as we must learn from their failures, we must learn from their myriad successes.

I highly encourage you to read Blackshirts and Reds.