I don't think Patrick should be immune to fan criticism and expressions of frustration. If people believe the rumors that he wants out of Philly, and interpret his hiring of a new agent, and the agent's response to questions about requesting a trade, as supporting those rumors, then it's only natural that some fans are going to vent. That's 90% of what message boards are.
If someone wants to believe that the Flyers weren't patient with Patrick, forced him to return earlier than he felt able, and caused a rift, that's their prerogative. I would respond by saying that is complete conjecture, which doesn't necessarily make it untrue; but there have been no reports indicating that is the case, unlike the circumstantial evidence indicating that Patrick would like out of Philly (hiring of a new agent; agent's cryptic quotes re: requesting a trade; media rumors that he wants out).
Interviews may not say anything on their own about the inner competitiveness of a player, but combined with low-motor on-ice play, an entire missed season, and rumors of a questionable work ethic dating back to his junior days, those interviews sure don't disabuse any notions that he's not a particularly passionate hockey player.