His rotations are crazy. There seems to be little sense in what he is doing. He doesn't look to create favorable matchups or anything.
The team is not playing for him. It's very disturbing that the team looks so uninspired. He needs to step back and question everything that he's doing. His motivational tactics AND his game management are not working.
He has plenty of excuses (injuries, trades, etc.), but it is starting to get to a point where fairly deep into the season, the team looks like a mess.
If we don't show big improvement over the next 10 games, I think you have to start wondering if a change may be useful.