Just search “The Economist Democracy Index” on Wikipedia and you will find that China is much worse. To us, the US or UK or Germany and any democratic country look like heaven. You at least have a way to know what the US authorities do to dissidents, but in China, the CCP usually kills them directly or harvests their organs alive and kills them, the number is much more than you can imagine.
I think I participated in the White Paper Revolution. On Urumqi Middle Road, I was put in a detention center for 3 days just because I stood on the side of the road for half an hour. I hope that the CCP will be overthrown more than anyone else, but it is unlikely. At least I personally cannot change anything. As for the millions of deaths you mentioned, if you know history, Mao Zedong killed hundreds of millions of people during the 3-year famine, which is more than any war in history. If China can really be democratic, I don’t mind the death of only millions of people, including myself, and considering the actual situation, even if millions of people died, almost all of them were CCP soldiers. They are not innocent. On June 4, 1989, it was also them who shot at unarmed Chinese college students. They do not deserve pity, even all CCPs also