The brutal reality is a huge chunk of people have voted for a right wing charlatan, whether he's full blown fascist we shall see. The American system has checks and balances but I don't think it was ever designed for someone like Trump.
There's no point lambasting the electorate one has, which is what you did, you have to fashion a more compelling message which addresses their real concerns, expose the snake oil shit that Trump sells. I posted earlier about a bit of introspection, I would suggest that's the first thing the American left should engage in. All I see so far is a purity contest on the fringes and as you were from the Democrat gerontocracy.
In the end figures like Trump need defeating at the ballot box, denigrating his supporters get you precisely nowhere.
What is a more compelling message than "All your problems are the other side's fault and I will fix them instantly and without pain to you while making sure those you hate and fear suffer?"
If you have the moral apathy to craft such a message just to win, that cannot be combatted until the 1) consequences of electing such a person are made clear to those who supported him, and they stop supporting him or 2) you are willing to get down in dirt and craft exactly the same message, which those with moral decency won't do.
Herein lies the problem and why Democrats are in complete despair -- because number 1 happened in 2020, and after defecating on election integrity without evidence, THEN Trump attempted to foment a coup.
So one would think that such actions after already rejecting him democratically would translate into a "never again" approach by the voting populace. Isn't that logical?
But it didn't.
In fact an even larger group bought the same line all over again, even after his post-electoral actions proved him unwilling to step down peaceably until his options were exhausted.
Now I am already on record saying Biden should have announced he was a one-term President after he won or, at the latest, after the mid-terms. And I said so then, so this isn't hindsight, and maybe that's the, or a, problem.
But it has nothing to do with "introspection". When the other side is willing to do and say whatever it can to win, regardless of consequences, you must of needs rely on the populace to see that as a leadership failing. And not enough of the populace could. And in fact, many embraced this approach.
How can you not denigrate (some of) them?