Who knows what really went on behind the scenes, and a player bears responsibility for his bad play, but I remember thinking at the time that Zimmer was not the best person to deal with a rookie like Dan Carlson having a shaky start. Perhaps for a while, that might have just been dealing with kickers in general. I have a feeling Zimmer does not have a lot of patience for things that are not in his wheelhouse.
Didn't someone, and his father, take a parting comment about how Zimmer treated players a couple years ago? Not that you don't have to take comments like that with a grain of salt, but the comments today are not totally out of the blue.
I think the coach often gets blame for things beyond his control, but I don't think there are too many people, maybe even Zimmer himself, that did not feel it was time to move on.