NL4 SH, TP on wet board vs fish

Way too much thinking for a hand like this at these stakes. You need evidence to believe that he would be donking with a flush draw or weak aces etc. Did you see him do that before?

Sample size is too small for taking AF into account.

Finally, board is way too freaking heavy. Very easy to give up on the flop, definite fold.

Preflop when you 3bet him your plan should be to continue with FDs or two pair type of hands on the flop. You TP hand will be dominated way too many times as he could limp call with better Ax hands, especially since his PFR seems so low. You can also C-bet dry flops and take it down, however this guy doesn't seem the kind who would want to fold so you could just call pre-flop and have others behind you call as well cause your flush draw would play great multiway.

On the flop you have to give it up. He van have better Ax hands, he can have 2 pair combos, heck he can even have a made straight. Even if he is donking with a flush draw your hand isn't good enough to protect. You actually didn't even protect your hand on the flop and actually called like a station. If you were completely sure he had a FD then you should raise (but please don't cause he can have a lot more here) to protect. When someone calls like that on that flop he wants good equity but you don't even have that.

On the turn your hand is still not good to move in. There are still better 2 pairs possible, not to forget straights or sets.

So in a nutshell I would fold flop.

Af 1.8 (although over a small sample) is not that big.

Considering the amount of hands that can valuebet donk there I would consider folding the flop and moving on to the next hand. There are way too many combinations of better hands or hands with a lot of equity.