The dysfunction was designed by the Krafts.
Internally they had coaches submarining the head man. No good could come of that. If the owner tells the DC he's firing the HC and replacing him with the DC in the middle of the season, and gameplans are being made while circumventing the HC, that is a high level of dysfinction RIGGED by the owner.
Not to mention foisting the most gutless QB in NFL history on the HC despite the HCs clear attempt to move on by signing a better QB.
This is par for the course from Kraft, what he's done since he jammed Guerrero into the locker room.