The president speaking before FBI Academy graduates today said clearly how he feels about FBI rank-and-file and the institution itself. He regards them with great respect.
We know however that Trump has an issue with certain people at the top. Mueller et al including Comey – and Hillary, Rosenstein, even the latest director, Wray (Yale law, a republican New Yorker, that’s a rarity, asst AG criminal division under George W.)
Just as in so many agencies of the fedgov, the FBI is pretty swampy at the highest levels.