“Why didn’t you fire Fauci?” is hardly a cheap shot. It goes to Trumps inexcusable empowering of that troll , in a way that devastated millions of lives. If Desantis runs ads with banrupted small business owners asking Trump why he stuck by Fauci - and he did- Trump’s primary campaign could be a short one. True believers like you won’t be swayed, but average voters aren’t guided by cult of personality. Trump kept Fauci front and center, and he defended the lockdowns - and even criticized governors who started to open up when Fauci said it was too early. This actually pisses Desantis off, which is a reason that he might surprise people and throw his hat in the ring.
You must think that the swamp reveals itself openly all the time. Very few thought Mike Pence to be the RINO that he is until November 2020, for example. Firing Fauci would merely have resulted in a clone of his taking his place.
You’re fabricating things now. Trump was the one who insisted that left-wing states open back up when it was clear that they were keeping things locked down to increase the hardship.