Preflop
For me to squeeze here I would have to believe, that UTG is going to fold a lot, because if he does not fold, then you are just creating some massive pot, when you are out of position with a medium strong hand. Without that read I am totally on board with just calling, even though you are allowing BTN and BB to realise their
equity, and you are going to be out of position multiway. You could even just fold here, and with KJo that would be my prefered play.
Flop
I think, the play here is 100% to just call. You are not drawing to the nuts, and its a multiway pot, so if you raise, you are usually just getting a lot of chips in, when you are in bad shape. If it was a large bet, you could honestly consider folding, since its a bit of a reverse implied
odds situation, but for 1/3 pot you have to see a turn.
Turn
You made your hand, which is of course always nice. Before deciding on your turn line, you need to plan the rest of the hand including answering the fundamental question "am I willing to stack off or not" assuming a blank river, that does not put a 1-liner to a flush or 2 pair/trips on the board. And the key to that decision is, if your opponents will be willing to put in 80BB with trips, when its a multiway pot, and there are 3 cards to a flush on the board?
I dont know the answer to this, because I dont play in this game. I will say though, that if these players are sort of reasonable, then probably not or at least not very often? If someone jam in 80BB on a board like this and especially multiway, then trips is just a
bluff catcher. And if they can hand read, then what are your bluffs here?
You overcalled on the flop with a guy still left to act behind you, and you really should not be doing this with hands like a weak pair or A high. The only draw just got there, so you should hardly ever have anything weaker than trips after calling on the flop. Which also mean, that if you lead here, UTG is just going to fold his overpairs, or at least he should.
You can still get called by someone with trips, because trips has equity against a flush, but trips might also bet itself to not let someone draw to a 4-flush for free, especially if UTG or BTN has it. And if trips is not going to call a river jam, you either need to use more of a blocker sizing on the turn or plan to check all rivers if called. Or check the turn to disquise the strength of your hand a little bit and then go for some value on clean rivers.
River
Maybe one of them has trips, but what does the other guy have then? The other trips or a worse flush? Maybe. But I think, its to optimistic to jam for value with less than the A high flush. If you had a hand like A5 of spades, you could get value from KQ, KJ, KT, QJ, QT, JT of spades etc. But now instead you need to worry, someone else have A5 of spades, and you block a lot of those second best flushes, because you hold the K and J of spades yourself.
So as played I think, this is a check and evaluate spot. If it checks through, you usually have the best hand, and you got your value on the turn. If someone makes a small bet, you can call and sometimes be good against trips, that tried to go for thin value. Or if it goes jam, call or small bet, jam behind you, you can fold and still have a solid 60BB stack left.