It’s quite simple; being anti-Trump in no way says what you are for. If you look at what corporate Democrats are actually for, it’s not particularly progressive and it’s not particularly helpful for the vast majority of human beings.
But, since neoliberals are greedy and morally bankrupt, they won’t change if they aren’t forced to, especially when the GOP keeps stepping up its game as a purveyor of greater evils. How much worse can they get? Wait and see. The GOP villain will be indistinguishable from Godzilla strapped to a hydrogen bomb.