people skills, instilling confidence and belief, having the whole team pulling in in the same direction, putting your players in the best position to perform the best. That's all part of coaching and Flores sucks at every one of those.
It's probably more important than the X's and O's since you got a DC and OC for that. The coach has the final say but he is the one who gets them ready to play and focused. All Flores did his whole tenure was shit on Tua and almost cost us the chance to draft him. He is not head coach material in the slightest.