Not mentioning US problems every time they criticize CCP problems is not automatically hypocrisy, and this idea basically means you cannot criticize anything without criticizing everything someone considers just as bad or worse at the same time.
Calling a discussion on China hypocritical because it doesn't say "but US worse" is essentially trying to build in whataboutism into every discussion.
It's a symptom of increasing polarization and part of the problem.
That's the hypocrisy: not seeing the block of wood in the eye of one while complaining about the speck of wood in the eye of the other.
By trying to be less hypocritical we create a more level playing field based on facts, instead of gut-feeling based hatred.
Whatabboutism is, IMHO, used a lot as a way to circumvent having to address the glaring hypocrisy: i see it's used to shut up those to point out hypocrisy.
You may think only those two are relevant, and so every discussion of one party requires discussion of the other. I disagree with that fundamentally.
I'll be honest, I also disagree that one side is "clearly less evil than the other". For me, living in Taiwan and caring about democracy, the risk of Chinese authoritarian expansion and invasion is not a "speck of wood in the eye", frankly I find that framing disrespectful.
But that discussion is entirely beyond the question of hypocrisy. Again, the guy people accuse of hypocrisy said nothing of the sort that indicates that he doesn't see the problems of the US government. He merely didn't talk about them.
This isn't "shutting down talk about hypocrisy".
I'm gonna go out on a crazy limb here and say that this is on par with the genocide in Gaza? Mass sterilization, forced labor, sex, and torture on a larger scale than Gaza. Certainly we can argue about which is worse, but they're both incredible atrocities. The only thing that makes China less scary IMO is that they currently aren't the empire ruling the world and at the center of the global economy. If that changes, as seems likely, I don't see any reason to believe China would be a better or more compassionate world ruler than the US.
When someone points out hypocrisy, this is "the answer", it seems. But it is just a statement, not a rebuttal of the hypocrisy that was pointed out.
Hypocrisy is still hypocrisy.
And bad things are bad things. Yet no amount of propaganda (red scare, "eew dictatorship", Uyger-genocide, Taiwan threat) can convince me that the China is as evil (or more evil) than the US-Israel alliance of the the last 50 years.