I don't think there's anything wrong with Sentry at all... I just think he's tainted under Bendis's pen. Bendis is a good storyteller a lot of the time, but he just doesn't get the Sentry. I don't think Sentry needs to go away, he needs a new writer who gets him. Someone who isn't best at street level characters. I don't think people like Bendis, Brubaker, or Faction could handle Sentry... but Abnett & Lanning, maybe Kyle & Yost, those types of writers could probably handle him. People who think outside of the street level box.
And honestly, I think Sentry would be a better fit in space, and he'd come accross a lot better than who he is now. I think he'd lose the traits that make people hate him.
Out of curiosity... out of those of you who've complained about the guy thus far.... have any of you read the original Jenkins mini that introduced him? The Sentry before Bendis got ahold of him?
In my opinion, THAT Sentry was amazing. He was very much like Miracle/Marvelman... but in a more Marvel way. His relationship with the other Marvel heroes and his mentality was awesome... nothing at all like he is under Bendis's pen.