It a little different now. POTUS may not be put to bed before the sundowners hits and decide to order his minions to seize the gold on truth social.
He largely put that group in place in the executive and the judiciary.
It's a lot more than "a single president". It's the two thirds of American voters who either voted for him or couldn't be bothered to vote against him, even after having seen how he behaved in his first term.
That's why he's not the biggest problem. He's more of a symptom than a cause. He won't be around for ever, but even after he's gone, most of those same people will still be around.
Without populism, he'd have nothing.
It's true that he 'duped' them, but we're all duped on some level.
Is it possible that we're not actually that resilient, but instead it will just take tens of years for the damage to fully manifest?
That's why farmers vote for politicians and policy that put them out of business. In my hometown, the county went from 150 dairy farms in 1990 to 3. They voted to keep their guns or whatever bullshit they were told to worry about, and were wiped off the map by the deregulation they "wanted". My little town is a rural ghetto, the richest people in town now are the school principal and state trooper.
POTUS is an acute condition. The sickness lay deeper.