Other teams know how to get him off his game. He'll have to figure that out if he's going to the NBA. He has great tools, but he's not handling thr physical game well.
KY has his work cut out for him right now with Demin.
Demin likely needs another year to gain strength and figure out how to play against physical D. The thing is, he has the length and bball IQ to exploit over-aggressive defense, but he just hasn't figured it out yet.