I agree that it looks a little dull and dark, and I am not seeing why it should be that way.
Also, I don't think the bricks on the right add anything.
I could see going for a low contrast look to underscore the shabbily banal feeling, but I think this is more successful if you push the whole thing up to brighter tones. Lose the blacks rather than the whites. This might be just be tradition or even a couple images I saw one time dictating my taste here, though.