I think Hamilton is a very hard person to read and I can wholeheartedly understand why people think he is sarcastic and offhand. However I do think he is being unfairly treated by the media and critics. I am no apologist for the man, nor even a fan of him, however I think his attitude in recent times has come from a frustration in his own performance and a failure to know how to express this nor how to deal with it. He is still very young, and clearly quite naive, understandable for someone thrust into the limelight with no guidance of how to handle it. At first I discarded comments suggesting he needed his Dad back by his side, but the more I think about it the more it makes sense. I think the sarcasm is him trying to be "cool", but it's really not doing him any favours.
Perhaps his subdued attitude this weekend was him reflecting on how good the season could have been had it not been for needless collisions, conflict within the team etc.