I don't think the facts bear that out. People voted against Donald Trump much more so than they voted for Joe Biden's "moderate" vision.
He lost because of COVID- and the turmoil the country was in- and the world was in.
Joe Biden didn't win becuase he convinced everyone he would unite everyone. Hell, he barely even campaigned- and when he did- it wasn't that impressive.
He won because enough people didn't believe Trump anymore- yes- because of his divisive and erratic approach, but mostly because of the pandemic and the country wanting to try anything else.
People voted against Donald Trump much more than they voted for Joe Biden. This is common sense- and has been mentioned by many people on both sides of the aisle numerous times- including some of Biden's own folks and especially by Trump's former advisors.
Of course, many people were tired of Trump's antics, including many of his own hand-selected advisors. But people will overlook most of that if things are going well. Hell, that's how Bill Clinton won re-election. He was a personal disaster like Trump- but things were going pretty darn well and he won.
Trump has always been divisive- he was divisive right away in his 1st term, but people overlooked it because things were going relatively well.