The US has the biggest prison population in the world by a big margin, 655 per 100k people (El Salvador is in second place with 604/100k and China is at 118/100k). I'd call that state repression.
In other measures it does better, like the so-called democracy index, where it ranks #21 (flawed democracy), which is better than China at #139 (authoritarian). In the reporters without borders press freedom index it's at #45, with China at #176 (almost dead last, out of 180).
https://en.wikipedia.org/wiki/List_of_countries_by_incarcera...
https://en.wikipedia.org/wiki/Democracy_Index
I would argue that state repression is not only about direct interaction with police and other agents of the government, and that economic inequality and poverty is less direct, but just as real, relevant and serious form of oppression. If you buy into that premise, then the recent UN report is pretty damning.
http://undocs.org/A/HRC/38/33/ADD.1
Some quotes:
"About 40 million live in poverty, 18.5 million in extreme poverty, and 5.3 million live in Third World conditions of absolute poverty."
" Its citizens live shorter and sicker lives compared to those living in all other rich democracies, eradicable tropical diseases are increasingly prevalent, and it has the world’s highest incarceration rate, one of the lowest levels of voter registrations in among OECD countries and the highest obesity levels in the developed world."
"For almost five decades the overall policy response has been neglectful at best, but the policies pursued over the past year seem deliberately designed to remove basic protections from the poorest, punish those who are not in employment and make even basic health care into a privilege to be earned rather than a right of citizenship."
I'd say that compared to China it really is better, in most regards, but "by most metrics one of the freest societies on the planet" is a stretch, to say the least.
I would also note that even including all of the damning things you list, the U.S. on average falls behind most rich democracies in the world, but is still far ahead of most other states, except in the incarceration rate [1]. Rich democracies are an outlier.
[1] I'm not sure that's quite true any more if you count in all the Chinese internment camps and other non-disclosed facilities - the U.S. never had secret prisons at scale, other states do.
I think you're wrong about the incarceration rate though, by a lot. China has an official prison pop. of about 1.5 million, to have a rate close to what the US does it'd need to have 7.5 million [1] people in the internment camps, which AFAICT is way higher than anyone estimates (I couldn't really find any good estimates, but for scale the total population of Uyghurs in China is 11 - 15 million)
[1]
(def us-pop 325719178)
(def us-prison 2121600)
(def china-pop 1403500365)
(def china-prison 1649804)
(defn rate [prison population] (float (* 100000 (/ prison population))))
(rate us-prison us-pop) ;=> ~651
(rate china-prison china-pop) ;=> ~117
(rate (+ china-prison 7.5e6) china-pop) ;=> ~651
Note, however, that none of those speculations is in any way meant to excuse the incarceration rate of the U.S., which is an exceptionally outrageous state of affairs. It also goes to show that using incarceration as a tool of social engineering is by no means the sole province of totalitarian systems of governance.
Your speculations about China sound about right to me, but as a European looking in from the outside, any time someone talks about how much freer Americans are it scares the shit out of me. The US might be the domestically freest of the global superpowers, but that doesn't mean it's any good, it just means the bar is set _really_ low.
The U.S. is indeed by most metrics one of the freest societies on the planet in terms of the state repression imposed on the average citizen, certainly far better than China in this regard. At the same time, in foreign policy it behaves exactly the same way any other nation state does - pursuing its perceived interests without consideration for anything else other than objective constraints to its power. Since the U.S. is by far the most powerful nation state in the world, its list of foreign atrocities far exceeds that of anyone else since WW2. However, that's not any different from any other major power in world history and there's absolutely no reason to think China (or anyone else) would behave any better or worse given similar ability to pursue its interests unchecked.