I think for most of HN's readership, China is the current Big Bad. There will be exceptions, like there always are for anything, but in general this will be true.
The US is something to be criticized because many HN readers either live in the US or interact with US companies/tech. Critiquing what one knows is to be expected. But they do not consistently describe every action of an American company, business or initiative as some sort of lie or conspiracy to suppress dissent. Some companies, they do; but many they do not. What would be HN's readership instinctive reaction to a mainland Chinese company that claimed to be like YC?
I think the parent comment was referring to this comment section. If you scroll down and read the grayed-out comments, there are indeed quite a few people trying to argue that "everybody does it" as a way of downplaying this.
The rise of King Xi should demonstrate that culturally China is still hundreds of years behind the West.
It's sort of the same with politics. You expect more from countries you see as sharing most of our cultural values. That's one of the reasons Israel for example is criticized much more than worst human rights offenders.
When something negative about the US is posted: "Downfall of an empire!"