As stated earlier, we all knew Trump would run again.
Doesn't matter. Trump wasn't a candidate in September '21. You're projecting. You're putting words in DeSantis' mouth. At no point did he ever say he would defer the nomination to Trump.
You're not the only one. There's a dozen or so FReepers repeating the same BS talking points, "DeSantis said he wasn't going to run if Trump ran and now he's a backstabber!"
At any rate, Trump deserves no coronation. He needs to make his case to Republican primary voters. Let him fight for the nomination just like everyone else.