This is not a good look for a player who is already under the microscope.
I understand that Cam Newton is upset, depressed, and probably not in the mood to answer these tough questions, but that's what you do.
After an awful performance in Super Bowl 48, you did not see Peyton Manning do this. He stood there and answered all the questions with class. Tom Brady, Russell Wilson, and all the other quarterbacks who have tasted defeat in the Super Bowl have gone through this. You did not see them do this.
Also, Cam Newton was just named the NFL MVP on Saturday. Is this how you want the face of the NFL to look?
When things are going right he is dancing, dabbing, taking team photos on the sideline, and wearing crazy clothing. When things go wrong, you act like a child and walk away? You just can't do that.
Cam Newton has some maturing to do before he can be considered an elite quarterback.
This is just what the Broncos defense does to people. Makes quarterbacks look defeated, immature, and just bad.