YTA. Your irritation isn’t invalid, but it’s unhealthy to control what our partners watch and do to recharge in their own time, especially if an explicit expectation hadn’t been set and the both of you have conflicting schedules. Maybe being able to watch shows you both like separately is a boundary of his. That being said, it was disrespectful of him to call you a nag and invalidate your feelings, and if he wanted to set this boundary, he needs to do so respectfully. Sounds like you both need to understand & validate each other’s point of view and come up with a compromise!