I just get tired of playing the damn thing over and over. And I'm not seeing it in the rotation as much as some people are.
Noob, I feel your pain regarding people camping on Terminal in MW3 ... but I think you were playing a different version of MW2 than I was. I was not fond of Terminal then and I'm not now because the only way you have half a chance against all the campers is to camp yourself.
For the life of me I have yet to figure out how Terminal got recycled as a fan favorite whereas something like Rust did not.