No, you don’t get it.
They hated Trump. More than they liked Biden.
We have had these apparent situations before - some candidates people love so much their party comes out in force, others the other party hates so much they come out in force. There are FOR juggernauts, and AGAINST juggernauts.
The biggest problem for Desantis and any other candidate Not Trump is that EverTrumpers will act childish like their lord and savior, take their ball and go home. That will be the biggest problem this election, which has probably never happened before. Dem wins.
Explain one logical scenario where DeSantis gets to and wins the general election. If you can’t do that then you are the one who does not get it.