Except they did. Votes for Grump in 2016 were completely understandable, sympathizable even. Responsibility for the train wreck of a first term didn't fall at the feet of the voters - it's explainable by one politician being an utter shitbag once in office. And for the most part our institutions did function to contain most of the (direct) damage.
But Grump 2024 was a known quantity. The votes in 2024 demonstrate that the average American is either proudly ignorant of the actual policies they're choosing (ie fully steeped in propaganda that hides/downplays the destruction), or actively malicious towards the rest of the world (while benefiting from a privileged international position). Neither one bodes well for future decisions, even if there is some political will to pull up from the current autocratic destruction.
And no, the "we didn't know how bad he was going to be" of a 33% approval rating doesn't make up for that. Grump was a known quantity for this election, and the only way someone could have "not known" is by actively rejecting listening to their fellow citizens. Which goes right back to willful ignorance.