We can fundamentally agree to disagree if you'd like, but IMO, a recruit of Hamilton's caliber is supposed to be able to overcome those challenges and still be able to impact the game. Everything else is just noise.
Take Purdue DT Jake Replogle, for example. He was a 3-star prospect, has battled injuries, and isn't surrounded by world-class talent. In five games this season he has more TFL and sacks, and has made a bigger impact than Hamilton has in eight games.
No matter what shares of the blame you assign to injuries, the coaching staff's ability to develop him, or the fact that he just isn't a standout at this level, there's no getting around the fact that Hamilton has not lived up to expectations.