Pretty sure there is higher EV in 4betting this pre.
1) Unless we flop a set it's hard to get both players stacks in and win, which is kinda why we would make it go 3way in the first place.
2) Our relative flop position is not optimal when it goes 3way, cus after BTN has cbet we are first to act but still have to worry about what the third player behind us does.
3) It's CO (not UTG opener as u said) vs BTN vs hero in the BB, so since the game is just 4handed ranges should be wider from both villains.
4) They are both non-full stacked players so I would assume they get in hands that are wider than QQ+ AQ+ pre.

As played flop x/c is pretty std.

Turn is gonna be a x/c if he bets imo, we don't expect him to bet/fold better and don't really have any river cards to worry about if he is behind, so I think x/jamming turn would just be spew.

River decision looks wp to me, just remember to pick your villain carefully in these spots cus upon first review of the hand (before reading your thoughts) I could def see him bet/calling some silly Ax cus he didn't have a full stack = fishy player. But if you have reads on him that he's very tight or something then I like the play a lot more, as he clearly should be capped. But generally speaking a non-full stack at NL5 is never folding 2prs/sets here.

Thak you very much for the review, I don't know how I didn't notice it was 4 handed, feel really dumb now. If I had noticed that in game I think I would almost certainly 4bet this hand.
I think I have a pretty good grasp on this player's style and he's folded to my raises before in some close spots, he gives a lot of credit to my raises (didn't see him in similar spots with other players). I should probably add fold to x/r stat or something to my HUD. Also he doesn't seem too fishy to me, maybe just lazy and didn't figure out the auto top up function or something like that.

4bet pre as mentioned

Well played until river but to be honest, if I was villain, I don't think I'd be folding 2 pair against a river jam... Sure, technically the nut flush/straight is in your range... but I would definitely expect you to bet it on the turn, if not, then definitely the river... Why would someone slowplay the nuts to the river like that incase villain checked back on river like he did turn? I just don't think it makes enough sense

The nut flush is pretty hard to represent as the As & Ks are already on the board... What flush hand would you flat with PF? QJs possibly but that's really the only hand.. Maybe JTs but that's close to the bottom of your flatting range OOP vs. 3bet I'd imagine...

I think I would just call the river to bluff catch due to his weak sizing

Interesting hand and I admire you for the balls! But as I said, if I was in Villains shoes, it wouldn't add up

I think calling pre is fine given BTN's likely strong range for 3 betting if that 5% is accurate. Cold 4 betting looks super strong and you'll find yourself up against QQ+AK most of the time if they 5 bet and you call it off.

Flop and turn are fine.

I would fold the river as a standard. At these stakes do you feel villain will fold a decent Ax in a 3 bet pot? I don't think it's terrible but if villain can hand read then I would expect him to be thinking that you would lead out on the river with anything that wants value.

I agree that 4betting pre would be the way to go. From the HH it looks like he's 3betting a CO opener so his range should be looser than if he was 3betting other positions. Flop and turn look good. On the river I like it in theory but I would be very hesitant to try this at 5nl. I don't really give the average player enough credit to fold even something as weak as an Ax to such a play.

I'm down with the call if players tend not to get AK in. But if we think he has a strong range why are we trying to make a move on him? Looks like a fold to me