I don't think he should necessarily be given an improved contract, money wise, because he already agreed to a new contract recently which took promotion into account, however I don't blame him for trying to get one, or a possible extension of a year, and if he's been too stubborn with it and fallen out with Wilder that's a real shame, but it is not deserving of some of the nasty comments on here. Which is the point.
He is entitled to look after himself over club, in the same way that he would be dropped in an instance if it was better for the club.