That was poorly managed by the staff. Timeouts should have been used in a more timely fashion and he should have been pulled. Talk to him for a few minutes, re-insert, and see what happens. Instead they left him in until everything began to completely unravel.
It's easy to sit here and criticize but it's one of my biggest pet peeves with coaches. If you are sitting on the sideline your job is to manage the game to the best of your abilities. While yes, the general play of the players is outside the coaches' control, they can help to calm the team, manage the crowd, and utilize timely substitutions based on individual play, foul trouble, and matchups. Nothing irritiTes me more when coaches miss those opportunities, get asked why in a presser, and say "we got outplayed" or some other crap like that. If you aren't going to maximize your presence, why be there?
Not necessarily saying Otz operates that way but I think you know what I mean.