since I had the opportunity to live for several decades in a country where communists ruled, although the system was called socialism, and communism as a regime was not applied anywhere in the world, I want to ask:

what do you think is the worst thing that has happened to humanity due to communism?

and how is capitalism better?

and what about so-called democracy?

It all depends on who is in power. In any system, there are good and bad people in power.

don't judge a horse by its tail...