[AlexB182]

I agree that AQos is not a hand you HAVE to play in any position but I think it's ok in OP's hand.
In fact, he is playing that hand mainly for one reason: isolating the bad player and taking the pot away from him on the flop.
That OP even flopped TPTK is a nice bonus as against such a weak player who regularly folds after small donk bets, but I'd make this play really with ATC and guess I would still be able to achieve a profit in the long run with it.
OP: think hand is played fine. If I had to guess I would say he got you either on the turn where he hit his kicker, or you lost against KQ with a straight on the river.