Deng has made some very tough shots. There's nothing to be ashamed about with that. What has really decided this game is the stupid second chance opportunities we've given the Bulls off of their missed shots, and certainly also our terrible inbounding. There are also some plays where Celtics players instead of taking it easy and just making the simple play, tried to do too much.
Also, this team has to seriously learn how to box out properly. There is no excuse for this. They have to be able to box out better than this. Get in position and force the other team's player to push you out of the way.