I disagree. When she announced her candidacy she largely had the election in her pocket. Had she run the same campaign for longer her support would have just been even lower. The only reason Biden stepped down was because the ruling class in the DNC made the call. The party voters were very vocally against him the whole way.

I'm a bit confused why you think republicans would toss aside a winning candidate. The party is laser focused on winning. That seems to be sadly a major difference. The DNC seems overly concerned being as milquetoast as possible and to simply assume a moral high ground.