From a policy standpoint, Trump did fine work, but he turned off way too many swing voters in 2018 for the midterms and the 2020 election. DeSantis is a proven winner who can bring in voters that Trump cannot. Besides… Trump will be approaching 78 by the 2024 election. Contrary to what he and his followers think, he’s not going to be elected President again.
I voted for Trump because of the Supreme Court - I didn't trust him to be conservative on any other issue. I do and did support his tax bill, and opposition to open borders.
But I really don't see what he'd do moving forward. I don't think he believes in fiscal conservativism at all, and would be happy to spend money if it boosts his popularity. I also don't think he cares about social issues.
I think almost any Republican would give us comparable justices - though I do think DeSantis gets an edge there because he understands the judiciary better than the rest. Other than that, as long as they want strong borders, I think all of them would be as good as Trump, if not better, on policy.