You get a pass on this because you're not an American and most Americans don't know what a Bill of Attainder is. But it's a law that targets a single person or organization. And the Constitution outright bans it.

SCOTUS has also historically been very unhappy with attempts to weasel word around the Constitution. Their position has consistently been if the effect is to do something that would be unconstitutional then it is unconstitutional.

That said. There's no reason to target a single company when we can regulate the industry just as easily. Unless the actual intent is to force a private sale for the benefit of American billionaires.

But with your response to an actual bill and over a decade of American data vendors selling everything to China; I can see that you don't care about regulating the industry. You just want to punish China. Nobody is refuting the horribleness of China. But there isn't any evidence they've even tried to do anything to the international version of TikTok. Or that the Singaporean company that runs TikTok would listen to them

So yeah I'm against giving the US government powers it's called corrupt in every country that's used them. Especially in response to xenophobic jingoism. This is being done the wrong way, for the wrong reasons.