Bad play ?

Yes. This is a great flop for you but what does raising achieve? You isolate yourself against a range that's ahead of you. Just x/c flop. Why did you overbet turn? You're turning your hand into a bluff.

When you raise for value(want to be called by a worse hand) you have to think of all the hands that can call a raise. So, Kx, flushdraws, sets, overpairs, mostly. There should not be any Kx in his range that you're ahead of unless he opens KTs UTG which not everyone does and that's only 2 combos. There are 8 combos of AK, 8 combos of KQ. Then obviously we're losing to everything else except flush draws, but we block some of those. So while this board is very good for you because even when you're behind you have the redraw to the flush, that alone isn't a reason to start raising. Once he calls you narrow is range to mostly things that are ahead of you. check/call the flop then check turn again and give him the chance to bluff or make a thin valuebet/protection bet with JJ-QQ. If he checks back turn lead out otr and let him guess whether you have a missed draw or Kx+ with his JJ or whatever.

Is raising flop such a bad mistake? I imagine this hand gets raised at some frequency in theory? We get called by better hand yes, but we don't mind too much.

But I think the turn card is one of the best for villain, overbetting seems weird to me. On this card you lose 44 combos and your draws are worth less since the board is paired.

Thanks to you all, villain had AKo :(

3bet pre
flop is ok you can call too ofc
Turn is fairly bad, you want to check or bet smaller
River not good. He calls all better hands and folds if he somehow has weaker hand

It might be alright in theory but leads to a lot of awkward spots OOP in a bloated pot with a bluff catcher. For me it's 100% a polarization mistake. It's not even like there's even any meaningful 'protection' element to our raise since the Ah is the best card in the deck for us.

Would love it if someone could explain why I'm wrong, genuinely curious because I have seen a high stakes pro raise this many years ago and I didn't understand it then either. Simply saying 'I have equity, therefore I raise' or 'solver raises this' isn't enough for me

I agree with you "the solver does it" is not an answer, if that's true we need to understand why. I checked quickly in GTO+ considering Hero is BB instead of SB (I don't have SB flatting range) and it x/r flop a fraction of the time. UTG has to call worse K's they're supposed to open (K6s, K7s...), 3rd pair (A4), gutshots (A2), etc etc

But I agree if we never raise flop we're doing perfectly OK and my point was more : I think Hero's turn play is more questionable than flop.

So i was thinking about this while decorating and I think it's just based around equity really. We have like 45% vs AK, 47% vs AA, so in an aggressive game with more bluffing/stacking off light we're always happy to gii otf with money already in the pot. Having extra value combos allows us to have more bluffs and still be balanced etc. Navigating turns/rivers could get dicey when they flat call though but if we barrel none hearts turns like half potish and check non heart rivers with a plan to check call given villain will think we're polarized and may not shove AK, KQ once we check I think that's a decent gameplan.

I use NL50 GG sim, SB actually don't play 3bet or fold strategy, KJs is a >50% call here

Flatting in the SB against a random $5 player UTG raising 3x is fine, but the 3b is preferable

Your turn bet is too big, so it cuts down on Villain's range. We wanna keep their range open. I understand checking but I'd rather bet smaller.

As played, check/call the river. Make him bluff the 67/68/78, the hearts, or shove the lesser Kings.