A hero for doing what? He started bitching about matters in the winter of Martinez's second season, not when it all started going arse up.
That's a very nice revisionist history you have up there, but it doesn't hold water. Baines was not guaranteed a starting place anymore with Oviedo providing tough competition and he didn't like it one bit.
It was pure self concern that had him briefing the Echo and stirring up trouble halfway through that second season (NOT half way through the third season), not the love of a club he's never supported at any point in his life.