St. Paul, I entirely get and even essentially agree with your perspective. Social media and messageboards bring out this insatiable appetite to be judge and jury for people we've never known or met or known anything personal about, and it can get ugly.
And while I agree that no individual instance mentioned can, on it's own, be a direct variation to "wife beater", the context and inference of a lot of these things stacked up next to each other speaks to a dude with some real problems.
You've got the alleged Village Inn freakout.
You've got him getting into it with other coaches on the sideline of the Holiday Bowl (link here
https://www.youtube.com/watch?v=hBs9P0z7xP8?t=93 )
You have how he lost his mind during the Miami game following Bo's lead like a little kid (link here
https://www.youtube.com/watch?v=9qdiH53SzOY&t=178 )
You have a lot of Iowa fans saying "good riddance" when we hired him away, which we chalked up to sour grapes, but they've stood by their notion that he was a bad influence on their program.
You have his presence at the final meeting, and although you don't hear him say anything, you do hear Bo go to him for affirmation several times, and can get a clue for what the dynamic was.
Basically, where there's smoke there's fire, this dude needs help, and this shouldn't be the most surprising thing in the world.