Honestly I think this is exactly what Trump wanted. He has a large very loyal fanbase that is now in a vacuum. He can't contact them through his normal routes.
He did his part to enrage both sides but now only one side gets to tell their story. His followers want to hear his side. So he leaves office (on his own or forced, who knows) starts his own news channel and some form of social media platform. He gets the attention he craves, can say for the most part what he wants and his fans get their fix.
Or maybe he fades into existence. I have no idea at this point but seems plausible.
I think you fundamentally don't get what motivated Trump to run for office. If you think about his age, his son and the evolution of the left, you might understand a little.