You drastically over inflate the influence of National and State Political Parties.Certainly changing demographics and a backlash over covid have played a major role in Florida becoming a deep red state, but the long-term incompetence and dumpster fire aspect of the Florida Democratic Party certainly hasn't helped. Even before the changes since covid Florida's Democrats had a long record of bungling and self-inflicted disasters. This is a state party that hasn't elected a governor since 1994, a US Senator since 2012, doesn't control a single elected statewide office, and hasn't controlled either house of the state legislature in nearly three decades. In 2018 they did come very close to winning the governor and senate races, but that's about the only bright spot.
In 2022 they ran an over-the-hill, well past-his-prime Republican-turned-Democrat for governor and not surprisingly got crushed, and as of right now one of their leading candidates for governor next year is - wait for it - yet another Republican-turned-Democrat. It's very unlikely that Florida Democrats are going to win running candidates that are basically Republican Lite, as Florida voters will simply vote for the real thing rather than the blander, "diet" substitute. The Florida GOP organization is vastly superior to the Democratic one in almost every way, and until that changes their fortunes won't start to change either.
Parties have rarely determined nominees or policies for decades.