Leave Twitter and build a social network not bound to the whims of an egomaniacal narcissist.

Continuing to provide help to Musk at this point is a waste of energy; he's not going to listen, as he feels most qualified. At least with cars and rockets, people could generally convince him to back off; with Twitter, there's no such hope as he's one of Twitter's most prolific users.

He will believe no one but himself about how to build that technology, and it is thus a waste of time to even try.