re: Jamal Adams is becoming unlkeable

I agree with your point as a whole in most situations. That said this situation is different. He doesn't want to be there so I would venture to guess that he doesn't care about the well-being of that organization. He's using his value and voice to get what he wants, out of the Jets organization. He feels scorned because of the contract negotiations, or lack thereof, and is opining his displeasure. Before that he was willing to stay.
Now judgement on his approach is to each his own. However, just because he's an athlete tremendously compensated doesn't mean he can't voice displeasure with his employer, particularly one he doesn't want to be employed by any longer, when he doesn't feel treated equal to his value. Ordinary, non athletes do this all the time. Difference is that a great majority of ordinary folks aren't locked into their jobs if they don't want to be. The can resign or quit and move on to different employer freely. Adams cannot. It's not apples to apples.