There may be another reason. Perhaps the body language on the sideline had more to do with frustration over just not being able to get this group of players to execute the way he wanted, no matter what he tried. There is a dichotomy on this board between those who blame the coaches, and those who fault the players. In watching the games I see many of the players making simple fundamental errors, unable to knock down simple open shots, not seeing the double teams and getting the ball knocked away, unable to box out, unable to put the ball on the floor and go past their man. I don't think the players gave up. Rather, I think this was what they were capable of, that many overrated their abilities, and that Ollie's sometimes morose sideline demeanor had more to do with frustration.
Remember that this current senior class was recruited a) after the departure of Calhoun, b) during the APR tourney ban season and c) before the 2014 NC. That gave us Samuel, Facey and Brimah. Purvis, another senior, was allowed to walk from NC St. Now we know why. He was losing PT to the less heralded Lorenzo Brown while he was there. Of those four only Facey developed more court sense, a more mature game, and significantly improved production, but even he was stunted by bringing in one season of Miller.