I'm not going to blame the voters for the Democrats' decision to throw the election, personally. They knew Harris was unpopular with groups they needed to win swing states. They knew Biden was unpopular too. It was their decision to crown two weak candidates without a primary and state publicly and unequivocally that they wouldn't change anything.
You can't look at your own record as president, knowing full well your actions and willful inaction have made people significantly poorer, and reasonably conclude that the status quo is an acceptable campaign strategy.