I’m sure that if trump makes a run for it he’ll claim that it was because he feared Biden and Hillary and the radical left were going to have him killed. Which I doubt no one but rumps die-hard supporters will believe.
But they’ll be leaderless and without a friend in the political world, hopefully relegated to fade off into obscurity.
However, I’m not really sure how empowered anyone is to stop him. If he’s not immediately placed under arrest upon leaving office, he could probably charter a private plane and fly anywhere he wanted. It’d also be an exceptionally compromising position for anyone trying to stop him if he tried to leave while still president during his hypothetical lame duck session.