A country which improves its behavior through self-criticism from its citizens is not a tyranny. It is just a government that makes serious mistakes.
No form of government has managed to avoid that yet.
Democracy and freedom don't guarantee the majority will behave well all the time. But they systematically leave the door open for improvement - even if it takes a lot of effort.
China, on the other hand, just bashed Hong Kong liberties, and to my horror, media already forgot about that.
And when you get to name a country that doesn't respect human rights, that still doesn't justify you to do the same
Ahh, the classic whataboutism prevalent in threads about China. No excuse, especially because almost all the bad stuff that those governments did are decades in the past, whereas China is doing those things now, accelerating them, and being defended by its citizens (and people like you).
Moreover, you can't just lump together governments like that? The UK is a completely different world than the US - for instance, their freedom-of-speech laws aren't comparable to ours.
And, if we're talking just about the US (which is the topic of discussion, not the UK) - the US does not "block freedom of the press, block and censor the internet, [...] push other democracies to overwrite their history, and commit genocide..." and the other things that we have (shamefully) committed are an order of magnitude not as bad as what China is doing now. The last time the US did something remotely similar to the million+ Uyghurs in concentration camps was the Trail of Tears in 1850 (which, as terrible as it was, involved less than a 10th of the number of victims as Xinjiang now).
You're sure making a lot of fallacies and bad arguments to try to excuse the behavior of a murderous, tyrannical government...