It'll naturally calm down by itself once he's out the WH and will lose his POTUS aura and a lot of power and visibilty
One and done. Hel'l become sooooo 2016, as that old, crazy tweeting psycho less and less people will give a about, including among his supporters expect for his hardcore fanbase.
He's still (somehow) POTUS and as such still draws a lot of mediatic attention, still induces fear and calsl the agenda, with the GOP following in line. and people reacting to his words and actions.
But once out, he'll lose pretty much all this support and attention, specially the way he trashed and disrespected everybody, his camp or not, journalists, governors and even SCOTUS...
People will be soon like "yeah, yeah, whatever dude... Go fool your adepts on Parler."