im not folding ever given pot odds and peoples tendancies to overplay their hand. If he has quads so be it, you only have to be good like 25% of the time.
But then again I wouldn't play it the same as you did. If he is a good player he will never call 3 streets with QQ or less. So when I'm called on the flop I either far ahead or far behind and I go into a pot control line where I c/c turn and c/c river, let him value town him self.
It's prob a fold since it's not like he ever has anything less than a decent full on the river. There's no reason for him to turn it into a bluff since we rep QQ, AA, KQ-AK or bluff (i.e. polarized range), and there should be no expectation of us folding any of that except the bluffs. I mean, he could also be spazzing w/ like 7's full or 9's full that got conterfeited, I guess? But that seems like a stretch. Imo, nobody (except Renton and super nits who make other, bad folds all the time) makes this fold in practice, which is another reason why he's not bluffing, but yeah, looking at it from my house, drinking my cup of coffee here, and leisurely thinking it through, it's almost definitely fold.
Why do we play this game is the question with tough decisions like this?? Having said that, it is a fold if he had 7's or 9's full he is coming over the top by 4th st right?? I feel he clearly has KQs or KJs but im still calling because i would not sleep for a week torturing myself about this hand