I’m disappointed but not very surprised.
In 2016 the Democrats chose a generally unpopular female candidate to run against Trump. They seem to have done the same this year. Kamala Harris was a very unpopular Vice-president.
In 2016 Hilary Clinton referred to Trump voters as “Deplorables”, Biden referred to them as “Garbage” this year. Neither are likely to change people’s minds, but they are very likely to motivate the people that they’re insulting to get out and vote to teach them a lesson.
The Democrats have been spectacularly arrogant this year. However you cut it, it’s been obvious for a few years that Biden is no longer up to it, and the Democrats have been hiding it – avoiding press scrutiny etc, only doing something about it when it was both unavoidable and far too late. At that point they chose a candidate who must have colluded in the cover up, and they wonder why they may not be trusted on key issues.
This is against a background of the Democrats in general being pretty rubbish at politics. They’ve allowed themselves to get boxed in on judicial nominations, something that is going to take decades to un-pick. They also, in Joe Biden, had a candidate who was reluctant to talk about abortion rights and women’s health, when it was a key issue.
They’ve also been unlucky, inflation, the Ukraine war, and the Middle East. However IMV they’ve not helped themselves with their triangulation and prevarication on Gaza.
Against that background I can understand why people turned out to vote for Donald Trump. I don’t think it helps to label all the people who did as stupid racists either.