Is there a question?

I was not sure if it's easy play for stack here, beacuse fishes are usually passive with middle stregnth hands. HIs AF 2 2 4, AFq 38 33 32. Cbet raise in raised pots is just 8%. He seems to be not really aggressive. And he makes quite a big overbet push

Ah ... little hint: don´t post result, it almost always influences the answers you get.

Regarding the hand, yeah, it´s an overbet, but recreational players do weird stuff and as often as you´re up against KT you´ll see hands like flush draw, KQ and stuff. Even moreso if Villain had expected you to raise AK pre so he feels safe.

Obviously KT is a threat ... but I guess I´m still going broke after him 3betting the flop.

And - yeah, 4bet pre. :D

I'd definitely be 4betting pre. As played, since the flop is two tone, and there are a ton of draws, I think getting it in can't be terrible. 

I'm quite interested as to future adjustments vs this player (and other similiar players) when you see him 3betting a hand like KT. Do you now 4bet bluff more knowing he can't withstand too much heat, widen your 4bet value range, or just call with hands like KQ, KJ, AJ, AT, knowing you could have him dominated a bunch of the time, or a mixture of all of the above.

I will not widen my 4bet range too much beacause I will not feel really comfortable to stack with a hand like 88. So, I will 4bet w 99+ AK I guess, while usually I would call w 99 TT. And after seeing this hand I will call 3bet with 66-88, A9s+, ATo+, KJo+, KTs+, QTs+, JTs, T9s. I think it should me much wider, but I'm not skillfull enough to call w 76s vs this player and make profit with it

I'd either 4 bet preflop because I think his range is really wide and there's a ton of value in getting him to call with worse hands OR I would call the 3 because I thought his range was really strong here. If I go with the latter option I'm not raising the flop because it makes little sense to raise with what's essentially a really good bluffcatcher versus a nutted range.