one criticism of Dean is that when he gets the ball he tends to try shooting it almost immediately. I know he wants to contribute given his limited minutes, but it often results in a rushed shot when we don't need it. He'd be better waiting for a good pass to be setup than rushing a 3 which is often bricked
He played good defense and think he had a nice dunk. The kid wants to contribute so he's gonna give his best effort when he can.
I think he's a good player but not playing his best right now. I think he'll get better as the season progresses. He seems maybe a little unsettled at the moment, and is maybe forcing too much because of it.
Someone he trusts needs to let him know that the way to show the coaches you deserve more minutes is not going to be taking 3s early like that. For one thing, 3s are low percentage shots for everyone so it's not the highest odds path to demonstrating success on the court. Dunks, like the one he made, and layups have much higher odds of success, so he should prefer them.
But also, a coach's view of the game is nuanced and, when players force stuff or exhibit a lack of situational awareness as was the case when he takes 3s too early in the shot clock late in the game while protecting a lead, the coaches will view it negatively even if you make the shot.
In that situation, take 3s late in the shot clock and the coaches will be much happier, 'specially if you make 'em.