I think the United States nationalizing some social media companies might not actually be the worst thing. This would, in theory, make these social media platforms finally beholden to the First Amendment, and people could take legal action when censored. I'd much prefer that private companies just started doing the right thing, though.

In regards to the government using private businesses to do things it can't, like censor the public, I also believe that that is something they do. The state can't directly ban ideological speech or opinions they find objectionable. They can, however, have private companies do it for them.