I know what you’re saying, that he wasn’t always like this.
But I think your timeline is way off. Two years ago, his craziness was taking him out of Pittsburgh. Last year was his craziest and he played maybe a game or two for NE after signing a big offseason contract with Oakland. 3 years ago he went live from a Steelers locker room which infuriated Tomlin.
I think this has been coming on for some time, a good number of years.