There always seems to be about one movie a year that was never even close to Oscar consideration for just about no good reason. It might be The Wrestler, or this year, Drive. Just out of the loop for no good reason.
And the oscars go to violent genre stuff frequently enough. Movies like Black Swan get some wins, or Silence of the Lambs, taking every major award. I think it's more that the academy is easily swayed by junky prestige pictures than that they're pretentious. When I look at nominations for Extremely Loud or whatever, it makes them seem more dumb than snobby to me. Which might just be me being snobby.