KQs on HJ vs reg on BB, FD + top pair on turn

Good you have the c/r stat of 1/18. It is not like a huge sample but we can safely assume that he is not some overly aggressive player and his c/r range is not wide and we can narrow it to very good draws and made hands. I would expect him to have 6s7s and Ts9s which is only 2 combos of draws. And then sets of course which is 6 combos of 44 and 88 if I count correctly. Regarding simple pot odds and this range you have a fold on the flop I guess because he has more value combos that beat you and his raise to 4x is quite huge.

But if he is semi bluffing with flush draw you have huge implied odds probably. So you might call flop and reevaluate turn. Maybe he will shut down and you will have a free river. If he has the range of draws and sets the Q doesnt change much actually. You are either still ahead or beat. So you can fold OTT and against the river shove I would fold definitely.

Yep, I agree with Dandiiik. It is not easy flop decision againt a player who have 1.1 AF.

River looks like easy fold. You have clear bluff catcher and he dont have enough bluff there imo.