Metacritic is ultimately flawed and a huge fail.
Just look at user scores; they either absolutely love the game, or they hate it and send the score to hell. There just seems to be no middle ground anymore.
To add even more poo to the fan, users just can't justify their scores. I remember seeing a COD4 score of 1, purely based on the users grievances that the developers haven't done anything new in the franchise. I don't know about you, but don't you think a score of 1 is better deserved for a game that is so fail that it's unplayable??