Ryan did everything in his power to destroy Trump. He only came around when it was given Trump would run, and then he did everything in his power to sabotage the America First movement.
Ryan is a Romney republican which is why he chose not to run, he knows the base will never forgive him.
Oh, I agree that Ryan disliked Trump and would have preferred other Republicans. And that he disagreed with some of the MAGA agenda. No argument from me on that.
I'm simply pointing out that the issues that he really did care about -- and that he worked with Trump on -- were conservative issues. He wanted less federal spending. He wanted to reform entitlements. He wanted to kill Obamacare, and he wanted tax reform. Those are/were core Republican issues at one point, which is why Ryan pledged from the very beginning to support whomever the GOP nominee was.
So again...he's supporting DeSantis because he sees DeSantis as the most conservative Republican able to win the Presidency. So I don't think Ryan's support is a rational reason to vote against DeSantis in 2024 any more than it was a rational reason to vote against Trump in 2016. Ryan just doesn't like Democrats.