Ultimately, the population mortality rate is what really matters. If FL was able to keep theirs lower, even if they had 100x more cases I consider that the ultimate success.
Good answer, to a different question.
The question here is whether Gov D took appropriate steps to combat the pandemic in his state.
Just like you might ask which of two doctors provides better treatment. Doctor A gives the patient various drugs... and the patient dies. Doctor B leaves town, vacations in the Maldives, never returns phone messages... and the patient lives. Would you conclude, Wow! I really like how Doctor B handled that patient! I'm going to him for all my problems! Probably not. True, life is better than death, but that would not be enough of a reason to prefer Doctor B in this case.
What governors can do is help prevent the virus from spreading, so that parameter is more important for answering this question.