He's an overweight 77 year old in heel lifts with a bad hair restoration job.
Weakness isn't what bothers them. They just want somebody who hates all the same people they hate. To see their bumfuck opinions parroted back to them by a man in a tie.
There was another article I read earlier about typical old Republicans lamenting the fact that they had accomplished nothing to run on going into this election. That's the old way of thinking. Now MAGA (The old Republican party is dead) voters only care about how badly you want to beat up the people Newsmax, Fox news, and whatever Billybob Basement Report podcast tells them to hate.
It's actually pretty simple, but you won't get any opposition to Trump while he's alive because he cultivated an actual cult. DeSantis will have a better chance when Trump is dead as long as he can keep up the "beat up liberals, they're the elite, they want to eat your babies, and they're communists" bit.
He is, but that's not what they see. What they see is the Ben Garrison body builder version of him. It's why his catchphrase was "winning", and everyone against him was a failing loser. I wouldn't be surprised if the whole election denial thing was just them (and honestly, him) not being able to cope with taking an L.