What we know publicly and how he is privately are two different things. He is human, he is a competitor he knew there was no way we were progressing any further with McDermott. There have been rumors and rumblings (which are to be taken with a grain of salt) he and McDermott had issues behind the scenes, but again we don't know.
Myself and others will be on the opposite side of some fans on this, I do not believe your Franchise QB doesn't have say... No way in hell. Lets be honest here, who matters more in the NFL to a Team, the Franchise QB who right now is considered the best in the NFL, or a HC? We arent talking Parcells, Bill Walsh, or the evil one from NE. We are talking McDermott. And we also saw how quickly bill belichick went south after Brady left. The Dynamic from the 90's back to the beginning of football have changed. And I haven't even gotten into what each is paid.