Democrats Need to Face Why Trump Won

Take a walk with this guy, who sees it as a many-decades process that resulted in MAGA:

https://www.youtube.com/watch?v=IX1vw0V2MY0

As always, "It's the economy, stupid." (https://en.wikipedia.org/wiki/It%27s_the_economy,_stupid) The Clinton campaign heard this and took it to heart. Why didn't Biden + Harris and the 2024 Democratic Party understand it?

Moreover, where's the accountability and movement towards focusing on what the voters actually care about? I don't see any heads rolling over their disastrous misjudgment of voter priorities.