And that is an understatement, one struggles to understand the thinking within the power centers of the Dem Party that allowed things to play out as they did. It's like a self-sabotaging to break the Dem party from within?
Nope. Just the left-hand tail of their voter distribution wagging the dog. They're still doing it. The "covering letter" of the recently released "autopsy" and most of the resulting commentary are evidence. Parties in defeat almost always first go through a denial phase in which the problem is identified as "we didn't sell our message well enough" (or, less charitably, "the voters were too stupid to understand") rather than "our policies are not what most voters want"; that can last through a couple or three election cycles and it is still where Democrats are at. The left-most activist tranche of Democrats are in "not one step back" mode. They'll work to get rid of a moderate like Fetterman, and, as so far is seen, put up a candidate like Platner against a very moderate Republican (Collins) before compromising on where they want to take America.