You are welcome to vent away. Since you are staying in the home and relationship, can we brainstorm ways to make it better for you? Is there a spare bedroom in your home you can set up as your own that is farther away from the TV? Is there some way to deaden the sound between the living room (or wherever the TV is located) and the rest of the house?
I hope there is some way to make sure you get sufficient sleep--because not getting enough rest affects your entire outlook on life!