From an interview with Maggie Haberman about Trump and her book about Trump and reporting on Trump:

He fixated on the paper and attacked me because of it. There were times when he attacked me over coverage — it was always over a story or something he saw me say on TV. One thing he got very upset about seeing me say on TV was that he watches a lot of TV, and then that became a fixation. He’s incredibly hostile to anyone suggesting he watches a lot of TV because he thinks it’s some knock on his intelligence.

Of course it’s a knock on his intelligence. It’s also a knock on his intellectual energy, his discipline, his abilities, his curiosity – it’s a knock on many things about him. Of course it is. He’s a profoundly stupid incurious lazy empty man who took on a job he had no intention of doing.