I think it's worth thinking about a long term distribution of outcomes in a democratic system. It's a dynamic process, how does it evolve, what are the summary statistics?
Well, we know there is some autoregression, some reversion to the mean, some rich time structure.
But crucially, it's an online learning system, with a decaying memory. Voters forget populists are bad, and vote for them from time to time. Then one of two things will happen: either we're all wrong and populists are actually ok, or they really are terrible, they do their terrible stuff and eventually get ousted, with voters memory refreshed.
It's not that it's a good thing, rather it's baked into how democracy works. Same as winters are baked into the progression of seasons, and there's no point despairing about them every year.
So it's a "let it rip", not as a vindictive response, but rather that's a sad but necessary part of democracy.