For those who can't put a second TV into another room, or don't want to (some of us actually like sitting in the same room with our other halves, watching a TV programme - but not if it is always the one they chose ) then start a quiet campaign.
Spend a week amassing data. Rule a sheet of paper into four columns. First column - date and time. Second - his progs. Third - her progs. Fourth - derogatory remarks by the other person, or the action they take (leaving the room etc.). Whenever the TV is turned on, make a note of what is watched,, when, and whose choice it was, plus the reaction of the other person - your own reaction too, of course.
After a week you will have a pattern emerging on which to base a "conversation" about how to even up your viewing hours, and also about how someone else's choices should be treated. The evidence will be in your hand, so it isn't just a whinge. Good luck!