Rupp obviously has great issues with interviews, that others don't have.
The issue is not the reporters. I'm not fond of some questions, for example inept questions about drugs, but Rupp is the ONLY person who chooses how he responds, no one else, and not the people conducting the interviews. Rupp has the choice, and can answer in any way that he wishes. He doesn't have to glare and act like an idiot. He can still be friendly and just answer in a friendly manner.
What I think he should do is to work on this, and come up with better responses to the questions, and yes write them down. For example look at his last interview, and compare his answers with those given by Garrett and Garcia, who were much more friendly, genuine and informative. Regardless the interviews, working on his responses would be good for his character and development as a person.
He's got some anger issues, obviously, the way he glares at the camera, and the way he acts bored and disgruntled, but he shouldn't take this out on the running public that is interested and supportive of his efforts and would like to know more about him and his plans. He needs to learn to be more friendly, and to seek out opportunities to connect in a friendly manner with more people.