Adding to the Daboll didn't get along with Micky D argument is the Brian Flores class-action suit.
“Ironically, during their January 11, 2022, text exchange, Mr. McDonnell also suggested that if Mr. Flores were hired as the Giants Head Coach, Brian Daboll might be interested in leaving Buffalo to serve as his Offensive Coordinator (‘Heard Daboll isn’t happy with Sean [McDermott] in Buffalo . . . might be able to get out if he doesn’t get a head job. . . thoughts?’).”
https://heavy.com/sports/buffalo-bills/brian-daboll-sean-mcdermott-flores-lawsuit/