I mean aggressively ugly. To the point of being distracting. My pick would probably be Scream 4. The previous films are beautifully shot and look slick as ice with the cool colors. The fourth one looks absolutely dreadful, though. The image is way too soft, the colors are brownish and ugly, and there's these weird halo effects surrounding light sources like lamps and police sirens. It's so ugly that it's repulsive to look at. Like there's vaseline smeared over the lens.
There's also a curious lack of establishing shots. Very strange. I consider Wes Craven to be one of the greats, but his later films didn't do it for me. A lot of it was reportedly due to scummy producers, though.
What are your picks?