He can't be traded until Jan 15. Even if he could be traded now, there is zero market for him. Plus, if he really wanted to leave, he had his chance in the summer, he just had to leave the pen on the table.
The bad news for you - and his haters - is that it is unlikely that DL signed him for three years just to give up on him after 20 games. Particularly since this is the first year he has regressed, DL isn't likely to change his mind about whatever it is he's seen over the past 4 years in such a short space of time.
You really are an idiot. He has regressed from last year to the point where Neto is outplaying him by a large margin. Exum's DNP is due to Exum, not anyone else. It's not like he had to do much to stay on the floor, if he could either make lay-ups or three-pointers then that, plus his defence, would make him playable, even if not very effectively. But right now he isn't showing he has a single NBA skill at one end of the floor, and that makes him unplayable.