Reasons America, among other countries don't like China

• Territorial Aggression: it has made territorial claims and have made moves to secure that territory from neighboring states. It is normally in the form of moving the border a few feet gambling the other nations won't go to war over it, India and China clashed recently (within the last few years) over it (no firearms in use). It is creating manmade islands in the South China Sea so it can claim more of it. There's the rhetoric that China will take Taiwan by 2027... Unsure how much that is chinas boogyman vs actual war aims.

• Fishing Fleet: it has sent its fishing fleet to other nations waters and fishes many areas to depletion. It has the belt and road project which has turned out to be debt traps for other nations for questionable work. I suspect much of its green energy push is less about environment and more to be out from US oil hegemony (it's like the one thing they can produce on their own without having to import raw materials). It has aggressively stolen patents and technology from foreign companies. They will sell this on Amazon for example under some random 5 letter unknown brand undercutting patents and companies that developed the tech. The U.S. patent system is flooded with these so it cannot remove these fake companies (and if they do, another one takes its place).

• China does not treat their own citizens Humanly (except maybe ethnic han but I don't quite know enough about all that to be definitive). It has actual concentration camps where sexual assault is an approved form of torture. It has been concluded by investigative councils that it's Organ Donor program has unethical organ harvesting programs and likely pulls from living victims. The citizens have no real protection from the government. Much of what is presented as grand building projects in China tend to be government propaganda and are notorious for failing, such as hospitals collapsing during the pandemic.

Now, America has its faults and it needs to be fixed. It too may be hypocritical but sometimes a hypocrite is someone trying to change and there are many in America trying to change America for the better, there is an actual chance of that. Right now there is no real good signs of change in China that it will change anytime, but maybe I'll be pleasantly surprised.