Nobody has ever actually done real communism on a national scale. The closest is probably the USSR, but that was a disaster because it was an authoritarian dictatorship that funneled money and power to the top. People only got token representation, the people were not actually in charge of anything, they got no real say in their leadership. Doesn’t matter that it was structured like communism says it should be, the reality of it was anything but communism.
Real communism would probably be pretty decent. There wouldn’t be too much to hate about it other than what you’d dislike in any government.
The problem is the humans running it. It’s a constant battle against power-hungry and self-serving people being in charge, just like any government, and no nation espousing communism has ever managed to prevent authoritarianism and basic kleptocratic people from settling in and running the show.
I am not for communism or here to espouse any virtues it might have. The concept of communism certainly has appeal and presents many benefits, however the reality of implementation and human nature virtually guarantee it will never achieve its intended form.