Results most certainly did not improve after Maguire left. We went from a run in the spring of 2014 of being almost unbeatable and inpenetrable to being very average after his departure. Anyone with eyes in their head who spent any time watching the team could see that.
Also, I have never said we are the only club that sells it's better players. You're just lying about that. I've acknowledged clubs like Chesterfield and Swindon do it. I've also pointed out that teams with genuine aspirations to get out of this league (pigs, udders, dirties etc.) tend to stand a lot firmer than we do. That's probably why we're still here long after they've gone.