Average table with some very passive fish and one older guy who is getting smacked with the deck. This old man is over 70, wearing suspenders and driving a scooter. He rarely folds when hitting a piece of a flop and has run down several good hands by backing into 2 pair or trips. When he bets he has it without fail though. Has not shown down any bluffs or thin value bets. I have not seen any check raises from him either. His stack is somewhere between $700-$800. He is our villain.

Hero stack ~350, limps in MP with 33.
One fish calls behind, another unknown calls as well. Sb completes and BB villain checks. 5 players to flop, pot $10.

Flop: 3 6 7 rainbow
Checks to Hero: ?

I bet $8 looking to start building the pot with a standard bet size. Both players behind me call, sb folds,Villain in BB check-raises to $35. Hero ?

I call the $27 extra and both players behind me calls also. Pot ~ $150

Turn: 8

Villain rips a tall stack of $125 into the pot. Hero ?

I folded. I'm only beating 76 and he looks like he has the nuts here. Probably going to be facing an all-in on the river and hating it. I'm also concerned about the players behind.

One thing I will note is that I did see him misplay AA horribly earlier. I don't remember full action but I know he limped, played passive until the river then fired a huge bet on a double paired board. Pretty sure he thought he was value betting even though it was a terrible/wet board.