Well it could be a few things really and not necessarily you supposedly telling the press your not happy about the call-up. It could be the fact some staff see it as favoritism (club or country). Also your not the only staff member at the club. You must consider the players too.
Calling up a star player for a worthless international fixture and choosing him over an FA Cup quater final (for example) would more than likely annoy a few people. Including you.