Yeah you're exactly right, as I said we live in completely different and irreconcilable realities. The fact of the matter is, given the option between sitting down with people like myself (Hexbear user) who have extremely different views, or just hitting the button that makes us all go away, the vast majority of people will just hit the button. It's not really even a liberal thing, people behave that way regardless of ideology (although I think there's something particular about how atomized and depersonalizing the current state of social media is that makes that kind of behavior more common).
But you see my point — you're perfectly within your rights to think that everyone who's a socialist/Marxist/whatever has gone too far or whatever, and not wish to interact with them. Replicate similar preferences across a whole community, though, and it ends up isolating them and creating the situation that the root comment of this thread is lamenting. We're just little echo chambers siloed off from each other because the cognitive dissonance of experiencing each other's versions of reality is too much.

It's not just a TikTok thing, though. And isn't the fact that TikTok has gotten as large as it has (despite its current status of being run under US oligarchs for US users), and how many USAmericans decided to start using RedNote when it initially was banned in the US, also evidence to the claim that China is having a big cultural moment?
I can at least say anecdotally that random people I've met who aren't politically involved have been getting more into specifically Chinese cultural products. Games, movies, etc. And among my inner friend group (who, admittedly, are definitely much more inclined to support China politically, not just culturally) we make jokes about Chinamaxxing too.
Also, there is no equivalence between the relationship between TikTok and Chinese culture as a whole versus YouTube and Google products. "TikTok is to China as YouTube is to Google products" is not valid because TikTok is to China as YouTube is to the United States. And while checking how people feel about a country based on trends on social media wouldn't be the ideal way to gauge things (polls are obviously better) it still seems reasonable.