People that are happy with the game are playing it or happy enough to not visit the forums. People that are upset, but care about the game just enough to not quit yet, will vent on the forums... and then get attacked by the white knights rushing to SE's defense. People that get angry enough to unsub generally won't bother to post. They'll just quit silently since they no longer care enough to bother. So what you're seeing is people who still care venting frustrations.