1. Donald Trump negates what's probably Joe Biden's biggest weakness in 2024 (his age), by being only about 3.5 years younger than him. Hell, Trump will be older on Election Day 2024 (78) than Biden was on Election Day 2020 (77).
2. Donald Trump already lost to Joe Biden once.
3. Ron DeSantis is a popular 40-something governor of the biggest purple state in the nation, who turned Miami-Dade County red.
4. Whether you like it or not, all the investigations and potential indictments coming Trump's way aren't going to play well in a national general election.
Need I go on?
Trump increased his vote total by 12 million in 2020. And, his record on the economy and everything else is far better than Biden's.
No former President or Presidential candidate has the following Trump does and the ability to pack arenas like Trump. And, certainly not DeSantis, who has the personality of a potted plant.
Do I need to go on?