Then give examples where they actually did far exceed what China does.
Snowden was just an example. The only reason why he didn't get kidnapped abroad is because the US failed. They were absolutely attempting to do so.
In any case, the CIA has an entire program devoted entirely to kidnap people abroad, move them in jurisdictions where they can be tortured, and then deal with them. It's called "extraordinary rendition".
I chose Snowden as an example specifically because he was a US citizen. If you want examples of non-US citizens, there are literal hundreds.
Anyways, here is an overview of the US extraordinary rendition program : https://www.tandfonline.com/doi/full/10.1080/13642987.2017.1...
There is pretty much nothing that China has done, that the US hasn't in living memory. From internment camps, slave labour at the industrial level, censorship, extrajudicial execution, systematic torture at home and abroad, ubiquitous and total surveillance, and so much more.
There are, however, things that the US has done that China hasn't, such as, I don't know, functionally annexing an entire island of a foreign country in order to torture prisoners held without due process. Or maybe systematic destruction of dozens of countries under false pretenses, killing millions, in order to accumulate power. Neither has the US shied away from imposing economic systems that essentially damn billions of people to poverty and cause millions of easily preventable deaths a year.
There is no country in contemporary history that has exported as much pain, suffering and death abroad as the US.
Now, I don't think that this is because the US is somehow fundamentally worse than China. In the same geostrategic situation, China would likely have acted largely in the same pattern. However, your claim that "the things the US does pale in comparison to what China does" is really, really absurd. There simply is no international force that exports and maintains atrocities to the scale of what the US does, because of the US position as the global hegemon and what it takes to maintain it.