Well for one they are trying to fix all problems, I've gotten a ton of updates for the game (even though I haven't encountered any annoying bugs let alone a game breaking one)
It's not hype that wins them GOTY awards for their games, it's because they create such incredibly addicting, fun games that are far and beyond your average experience. Just ask the average person who's owned and played Skyrim...Most will say it's their GOTY (many even say it's their game of all time)
It's not like this is the first bethesda game that has had problems on a massive scale, sure they are fixing it but if they put more work into there titles this stuff wouldn't happen time again.
All the games on the list deserved to win because they are all high quality even skyrim but from the reviewers not mentioning the problems to the ps3 getting a terrible version that can leave it unplayable to some should have some kind of negative effect. Any other game would get butchered if they had problems like that. Something like Call of Duty for example would never live it down but not bethseda games they get a free pass.
It probably is a great game and after the problems on ps3 are fixed I will pick it up but I hold the best devolpers to a higher standard and if you want to be the best you have to put work into your "masterpieces" Congratz on the win.