In fact, there is a lot wrong with Democrats. If there was nothing wrong with them, no one would be voting Trump over Democrats.
Leaving aside bipartisan issues like corruption, lies, and incompetence... Where Democrats fall behind Republicans these days is that Democrats consider party discipline more important than election results, or even any results at all. Republicans took note that Trump was making waves, understood that the wind was changing, and they remade the Party in his image to get ahead. Democrats on the other hand cut the head off of anyone who threatens the status quo of power in the party, and are then left wondering where they should get themselves a Democrat Musk or Rogan... you already had those, but you could not forgive them they had a few of their own ideas about things too, and you threw them away and turned them against you!
This is why Democrats are left fielding unelectable mediocrity like Clinton and Harris, and of course Biden, who only won the first time because Trump had made such a joke of himself. By enforcing rightthink in the party lines without exception, everything that can draw and keep voter attention is bred out of the Democrat bloodline. Bernie, betrayed. AOC, of borg by now. Mamdani, in progress. Platner, destroyed. By the time anyone can get nominated, they have already for years had the charisma of drying paint, and vision to match. The bloodline by now is of late stage Habsburg quality, with results to show for it. Came Trump second time, even the joke that he is was still beat the joke that was the Democrat campaign. Not only that, Democrats have lost the ability to govern and are basically imploding by now, only making half-hearted noise about issues, but folding every hand without any actual fight. Pity.