I looked quickly over the comments in this thread but the coaching doesn't seem to be getting enough blame (not to take ANY responsibility way from the players - they certainly deserve the blame they're getting). I did just gloss over it so maybe I missed some comments.
At one point in the fourth I think the Celtics only had one turnover in the entire game and they proceeded to turn it over on I think three of the next four possessions. The offense was in a total flux, Atlanta was scoring and not a single timeout.
Did Joe understand the implications of losing this game? This is not the regular season where you can let them figure it out. The title is there for the taking. Milwaukee is down 3-1, Embiid is hurt and all of the western conference teams seem flawed.