NL500 Zoom vs a nit with slowplayed KK

Moved to this forum

Going by your Turnreads I fold and don`t feel bad about it. Nits usually are Nits because they masstable or are bad postflop. That doesn`t automatically exclude the chance of him exploiting his own image and turning hands into a bluff (which would btw make this a pure infocall) but it makes it less likely (imo).
Too tired to take a look at each street though so the above is just a general thought

U should definitely 3bet it pre almost 300bb deep. As played, I'm calling that river. Can't see any point in c/r because ur range is bluffcatcher heavy and u shouldn't be betting very often (I assume u raise ur nutted hands on the turn that deep). Also I think bigger bet is much better because after he bets 2 streets and checks the river he has total air or something like Qx. He most likely isn't folding that because we still have many double floats on this turn.

Edit: Forgot we were multiways on the flop, so we don't have almost any floats, then betting small makes sense.

Nits gonna nit, he has QQ-JJ, move on. You're play is fine, you just got unlucky.

turning his hand into a bluff would make zero sense against your range, surely. bottom of your value range is unlikely slowplayed KK or maybe floated AQ... next weakest hand is QJs? if he was bluffing he made a big mistake and got lucky.

it makes no sense to checkraise river so big with AA if he pot controls it. And i dont see why he wouldnt vbet his sets on turn or atleast checkraise them.