If you're saying US companies (that classify as whatever you're defining them as) should be forced to carry all legal speech, no matter how terrible or cruel or provocative it is, I'd be okay with this, and that means literally all spam, and that admins would not be able to moderate any legal speech. If it's any less than this, I'm not okay with what you're advocating for.

And effectively this would turn these sites into platforms that are so filled with trash they will be unusable. And the chaotic part of me would love to see that happen. But it means basically the end of these companies to function.

Realistically, I think we should keep to the standard we've had in the past: we can't compel companies to host speech they disagree with, and we should take strong measures to limit their anti-competitive behavior and break them up into competing companies if necessary (like we did with telecom)