Looking at that post by Hayes and hazing the kid and all that, it reminds me of how Fish handled things his first couple seasons with the Rams when he loaded the secondary and defense at large with rookies. I seem to recall him managing the team on the rookie treatment, that they "needed" those kids and to remember they're going to be depending on them so treat them with some respect and protection.
Going back to Jared it just seems like he was set up to fail in more ways than just the roster around him and Case. He entered what looked from the outside to be a damn near hostile environment where players were protective of Case as their QB to the extent where they viewed Jared as a threat. And I get that to an extent. But once it became clear that they weren't going to win games with Case that was the time where Fish and the staff and the team leadership at large should have rallied around the kid. But I never saw that. And that type of behavior goes back, too, like with Cook pushing the besieged QB on the sideline the previous year even after he was the one who had made the mistake.
Seems to me that you had vet leadership taking care of the kids on the defensive side all along but never on offense. Instead there was a culture that strikes me as thuggish, or dumb, too dumb to realize that they should be protective of these guys as well.