Dem incompetence and long term trends were obvious factors. Especially the influx of Midwestern and/or white retirees plus the shift among Cuban Americans towards the GOP. In addition, Crist was an uninspiring, has-been candidate that lost multiple statewide races on multiple ballots (R, I and D) before.
Was it those groups (particularly Cuban Americans) defecting or voting for Desantis for the first time? I suspect more it's more of the latter.
Crist ran an unexpectedly horrible campaign, doing basically everything wrong.
Yeah, I'm not sure what happened there. From what I can tell he let up on Desantis during hurricane Ian and was short on funding. Crist also has a lot of losses on his record.
Crist never ever had a chance EVEN if he had ran a perfect Campaign. Two Major Factors contributed to DeSantis big win: Hurricane IAN + his COVID Policies. Most people in Florida voted for DeSantis because he defied the Democratic Propaganda Machine and kept the State open. Crist openly said in various Events he held throughout the State that he would bring back Mask Mandates among other things.
A third factor was his poor Running Mate Choice with Karla Hernandez-Mats who turnout out to be quite a dumpster. Also, the Voter Registration Changes: R's had a 300,000+ Registration lead heading into the Election with many Voters coming from northeastern lockdown States such as New York, New Jersey + California in the west.
Finally Crist became a single issue Candidate for the Final Month of the Campaign turning into an "Anti-Abortion Crist" ignoring Inflation, the Border among other things. Not surprising since he had no Record to run on having voted with Pelosi, Schumer (from 2017-2021) and Biden (since 2021) 100 % of the time since he got elected during the 2016 Elections.