Peters is not above criticism, but you can't really tell from the comment how he felt about the season in general. He's exxcited about getting to the pro-bowl, and for him, perhaps thats the pinnacle of individual play for him. He personally is shooting for the pro bowl each season, but that doesn't mean that he doesnt want the team to succeed. All he can do is go out there and perform to his top abilities, and he can't very well conrol the abilities/playing of the other 52 players on the roster.
As for the trade talk, that would be the height of stupidity. You don't trade away a top tier LT who is only fuggin 27 years old. you pay him. plain and simple.