Again, that isn't true. The COVID lockdown protests were a great example of how things have softened in China. 30 years ago it would have been a violent crackdown, but instead they folded pretty quickly.
As for the US, I think it's a really dangerous time for it. You have Trump who is an actual crook, and openly talking about dismantling your democracy. The Democrats seem to be pretty useless, and can't even reliably beat that guy, let alone undo some of the damage he has already done. Women have lost basic rights, and so have LGBTQ people. Then you have the influence of Israel, and yet again violent crackdowns on student protestors, like nothing was learned from the 60s and 80s.
No matter what happens in November, it doesn't look like things will improve much, and it's all recent.
Which is not to say that a dominant China is preferable, merely that I'd prefer there were no dominant powers.