So I'm 100% speculating but I wonder if/how Zacha's dad is involved in all this?
He seemed like one of those over-ambitious parents who do more harm than good to their kids. Always talked Zacha up and pretty much allienated the whole Czech hockey by criticizing everyone and anyone (coaches, the whole system, evil-guys-not-appreciating-my future-superstar-boy-enough). Even if some of that was justified it definitely didn't make Zacha any friends.
Is his dad bitching to him about the Devils stiffling his glorious career? Could Zacha just be burned out from the pressure? Or maybe he thinks daddy dearest is right and he really is being under-appreciated.
What do I know; but the guy was a pain in the ass when the kid was a teenager, doesn't seem like a huge stretch he'd be a part of this mess now just a few years later.