I think as with the move to the right in the UK and other European countries, people are looking around them and seeing the rich get richer and richer while the poor keep getting poorer. They see towns with no manufacturing and no jobs, children with no futures and they look for someone to blame, so they blame the, generally, liberal/left leaning political parties under which much of this has happened.
In fact globalisation came out of the rightwing politics of Mrs Thatcher and President Regan, but the more leftward leaning governments that followed, and that includes the USA followed through in the misguided belief in openess and internationalism, which they confused with the globalising market economics of the right. Remember Peter Mandelson sayng he was: intensely relaxed about people getting filthy rich as long as they pay their taxes. Well, of course they never do. Since the damage done to people's lives happened when centre/left parties were in power, those suffering, have two choices, go right or go extreme left. A choice between a rock and a hard place. Most have chosen to move to the right - and that includes in the US.
The Democrats lost the election because Jo Biden was the best man for the job and that tells you all. They simply have no one with charisma, presence or intelligence enough to counter Trump. Trump did not win the election, the Democrats lost it.
He promised to sort everything out, get America back to work, given how weak the alternative was, it is not surprising people voted for him, even intelligent educated people. In a 2 party state he was the only alternative to more of the same under Biden/Harris.
Perhaps Trump is the antidote to Mrs Thatcher, he is the one coming in from the cold and throwing all the toys out of the pram and starting again