If I’m not mistaken, this is similar to the anti-trust break-up of AT&T in 1982. Sue Facebook/Google/Twitter for anti-trust violations, win in court, break Facebook/Google/Twitter into smaller companies.
At the same time, define them as “common carriers” or “utilities”, at which point they’re no longer responsible for the content.
But at the same time they can’t look at content. Which might break their business model.
Not an ant-trust lawyer, even on the Internets.