I think most people are so turned off by politics that they can’t be bothered to listen to actual policy, or so buried in ‘both sides are owned by corps’ propaganda that they assume policy changes are always harmful. I doubt that most of the people polling negative on Biden could name a specific policy or action that they disagree with. I mean, I would also like to see a President born in the last half of the previous century, but if the biggest criticism is, “he’s old,” then he must be doing alright. It’s an easy criticism to understand and impossible to refute without resorting to ‘so is the other guy.’