The US is plenty authoritarian and China becoming a democracy wouldn't actually change any of the things that people are paranoid about. The state mucking around in private industry to achieve political and national security goals and wage information warefare is as American as hamburgers.
Taken as a single political entity on the national stage China is just USA but in italics. It makes total sense that we would be uneasy in the US but that unease is how everyone not in the US feels about us. The unwavering belief that we're the good guys leads us to project our military might much more freely which doesn't exactly make us popular.
It is crazy that TikTok being a Chinese based company is obviously some ploy to undermine the US while in reality the CCP just forced TikTok to change their algorithm to be educational in China where such a thing wouldn't fly in the US because of the first amendment. China's video game ban for under-18s operates on the same principal.