I wasn't necessarily disagreeing with you but rather, just trying to offer another perspective. Tyren was struggling for whatever reasons against MTSU. There's no doubt about it. However many coaches prefer to allow their players to get into a rhythm on the court and work out their issues in the game versus taking them out. For example, Roy Williams rarely calls a timeout in the middle of a long run against his team and he tends to allow his players to work through their struggles on the court. If you are missing foul shots and rushing your jumper, there is often little that you can say that will change what the player is doing wrong and let them settle down during the game. As a good coach, you have to be able to identify when to let them stay in and when to remove them, especially if their emotions are taking over and they are not relaxing.
You can talk about practice all you want but the bottom line is that Bureau and Gradnigo or arguably our two most talented players but they are also our laziest. If things are not going well on the offensive end, they are a liability on the defensive end as well. We don't carry the tough rebounders mentality that "every ball is mine" and we don't have defensive toughness or discipline which is to be blamed on the player and coach.
In regards to practice, you are exactly right. However, the players are the one's who practice. If there is no effort and focus in practice, how can they do it perfectly. When I played, there were just days where we were unfocused and our energy was zapped, there was nothing our coach could do about it so we had to know when to restructure. I sometimes think that people put too much blame and too much praise on the coach.