Yeah she was my preferred candidate from the outset. I just don’t understand what happened.
I always start off campaign post-mortems with where the candidate failed. Then I focus on the electorate. Others in this thread have done a great job of highlighting those issues so I won't be.
Anyway, off the top if my head...
She had spooky battleground polls, allegedly didn't hire a pollster to work for the campaign (novice move if true), courted the wrong voters (why are you going after Sanders' hard 15%?), had an incredibly high burnrate, got overly wonky trying to explain a proposal she erroneously co-opted (Congress legislates, stop legislating), waited too long to go on the offensive (she did nothing to stop Buttigieg from rising at her expense, his proposals were never even vetted), peaked too early, is a woman, etc...
We won't have enough info to do an autopsy for a minute.