I would say less 'least bad' and more 'held back from his worst instincts.' It's hard for someone of his persuasion to win a majority in a parliamentary or semi-presidential system, but its easy to go to town once they do. Obviously this doesn't apply to Putin, who didn't have any democratic institutions to really undermine in the first place, or Singapore which was never a democracy. The US is fortunate that our culture, laws, and institutions evolved or were designed to enfeeble authoritarian attempts to co-opt institutions for permanent power. Once Turkey elected Erdogan for instance, that was basically GG.
It also helps that Trump is indisputably the least intelligent of these people.
