I don't doubt there are lots people who settle on tiktok as their main social media platform to avoid the sea of nazis and fascists on twitter/facebook/etc. but IMO the major reason is that it's just a waaaaaay better product compared to the dog shit american apps and websites.The reason people have been flocking to Tiktok is because it genuinely offers a valid alternative to American social media companies that're contributed to what is currently the biggest threat in the US. Because it's not China, let alone what they do with the user data THAT META SELLS TO THEM BTW that's the biggest threat to America. It's the current state of the US that is the problem. To the point that talking with non Americans about US politics can genuinely come off as embarassing because we have to acknowledge headass shit like MTG and Lauren Boebert being elected politicians or the fact that our next election is between a rapist who had no business ever being president in the first place vs. a man who statically is incapable of keeping in touch with the needs of people who're the most affected by the current state of America in spite of his best efforts to do so. This is to say nothing about how much lobbying/borderline bribery affects the politics of the American government even if it's at the expense of the people. Like for instance how the NRA makes donations to specific GOP members. Or how Meta pays politicians to malign competition. Or how people like Tom Cotton are paid to promote genocide.
We know Meta spends millions to lobby congress to ban tiktok and they'd rather do that than produce a better product.