I don't think it's a leak to not be able to fold AA in this spot. Jam for value or call down. And I won't discount AQ and maybe even KQ from his range. Guys without full stacks are likely to be fish and fish sees two pretty cards and can't fold. And given that he called a 3b OOP w/ 2/3 stack makes it seem like he's a fish even more. He should really be jamming pre with most of the hands you mentioned in his range. If he turns up with one of those hands pre and he 4b jams a decent amount of the time, you can probably discount them in the future when he 4b jams.

If he makes a set, well...people who makes sets in 3b pots make money. I know it's hard, but try not to be results-oriented.