My gut reaction was that Sam is a selfish cold-hearted bastard! I'm not sure if the writers have forgotten the lengths Sam went to to save Dean in 'Faith' or how he tried to hard to save Dean from hell, or how devastated he was to see Dean die over & over again in 'Mystery Spot. I could go on, but basically I think Sam's character has changed too much and it's getting annoying. As you said, Dean's self-esteem is at an all time low and Sam's words will just hurt him more. His face at the end. so sad! On the plus side Jared looked good in his gym wear and Jensen still managed to look attractive in the hairnet!! Sorry for the ramblings.