I think this is likely the meaning behind the poles right now, but I'm guessing people will rethink that as the election gets closer. I think a bunch of Democrats are pissed off at the Democratic party and trying to make a point but when it comes to voting time I think reason will prevail.
It's not objectively better to have Trump than Biden even though Biden is declining mentally and the reason for that is because Trump in his prime is despicably unqualified to be president. He's a self-serving cretan, bully, narcissist and maybe worse. Trump is mentally unfit to be president, but he's also emotionally and psychologically unfit to be president. He cannot serve the country. He can only serve himself. When he's sharp and focused he's a danger to the country.
I think Biden is declining and I don't think it's crazy too assess him that way. I do think right-wing propaganda crops videos of Biden dishonestly and adds scary music the way conspiracy theory videos do to make him look worse than he really is though.
Still Biden will put together a decent cabinet in his second term just like he did in his first term. Whereas Trump will put in family members fools and f****** idiots!!
Partisan stuff aside, the whole situation is a ridiculous train wreck and I can't believe we're here as a country. The last eight years has shattered my faith in this country profoundly.