I agree with the disappointment part of your post.
I don't necessarily agree that if he does well elsewhere, that indicates Rutgers did a lousy job developing him. Sometimes a change of team, scenery, locale, coaches does a player well. It could be combination of these things or perhaps maybe coaching alone, but that would be a guess.
To be honest, I'm not so sure AK will do better, but he is the QB for RU now, and I will root for him. And the comparisons that will occur in every in game thread and after game reactions will be meaningless. The WR corps turned over except for 2 receivers. We "may" have a TE that can do more than block. Those are significant changes. Perhaps GW would have done better with the new corps of WRs and TEs. We will never know, and I am not going to criticize GW based on the performance of this year's QB(s). That's silly and useless, but that's what happens on message board.