I've been saying this ad nauseum, but Dangelo needs to pass when hes trapped coming off a a ball screen. This is not a complicated concept. This one little change will make our offense much more efficient. Open looks for everybody!
Don't really care about his demeanor per se, as long as he isn't disrespectful of coach, teammates, or officials. And he's not. Players roll their eyes all the time at coaches, if the coach wants to get in his face about it, that's his business. But that's a part of sports. Just like fights in practice, guys pissed over playing time, and complaining about calls. It happens, as long as you're not the guy who always does it, then it's no big deal.
I give players a lot of benefit of the doubt for their 'attitudes' on the court. That's in the heat of battle.
I sure wouldn't want someone judging me based on my facial expressions while I'm at the gym, or going for a run. As long as he doesn't cross a line, or even if he does - if it's only once in a blue moon, and he apologizes for it afterward - then I don't have a problem. Heat of the battle fellas, a lot of these reactions are human nature.