Certainly doesn’t have the feeling like much ado about nothing. As others posted earlier, BUs demeanor completely changed half way through and the fire and intensity we usually see had subdued in my opinion. I also believe BU will move on this offseason.
Not saying you're wrong, but I think there could be other reasons for the clear change in demeanor.
My interpretation has been that this was just a very challenging season to navigate, as a coach, but especially as the kind of coach BU is. With the lack of a clear alpha player, overall youth and inexperience of the team, obvious personality/culture issues, Skyy's underwhelming play as starting PG (and subsequent departure), untimely injuries, players having extended slumps, etc...BU is no idiot, and the writing was on the wall that this team was just not going to pan out. I think it's been said by a few, in different ways, but I get the impression nobody was happier to see this season end than Brad.
I also wonder if somebody got into his ear about the yelling and going nuclear, at some point...or he realized on his own that he needed to chill out a bit. There could be some truth to the notion that's been bandied around about today's average player simply not responding well to that style of coaching, if not outright rejecting it. Player egos are well fed in the era of social media, NIL, the transfer portal, etc. Could be that BU has been (perhaps begrudgingly) trying to change his tune a bit, in an attempt to adapt to this new reality.