PLO10 vs unknown villain.
Hero opens, Villain 3bets. Pot is 2.20. Stacks 20.
Hero cbets KKxx on AK9 with possible FD, villain pots to 8.
No backdoors, no gutshot.
Snap-fold? (3bet is 90% AA)
Snap-jam? (how stupid/obvious can anyone play AA?)
Accept the setup?

If you got 3bet it's not a cbet on the flop, it's a donk lead ... this is a terrible board to donk lead.

Given you posted (sorry, had the read on the 3bet) I've done massively exploit x/f lines vs. some villains, but you have to be right a lot.

Also given your read it's a (much easier) fold to the 3bet pre.

OK. Hero donks. I guess playing 6 tables is a bad idea. Missed the action and the read and happily got it in with the set, because - in general - tables were pretty soft. But how brutal is this mistake?

fold to the three bet

Maybe it would be good to write down all the cards of your hand in order to discuss the scenario and I can´t 100% follow what happened in the hand or what you think about it. I could imagine that you should try to think more detailed about the great game I think PLO is a lot about building good and detailed thoughtprocess, because there are so many scenarios. I also had tendency to play too many tables, but esp. in the beginning it is hard to follow action and not getting overwhelmed then. sometimes even playing only 2 tables can be more benefitial

Don't be looking to fold 2nd set please

KKxx is one of the best hands to fold to 3 bets imo..

How can you make a read that 3b is 90% AA when it's an unknown villain. Population reads? If xx side cards mean garbage then you should fold pre. oop with weak kings against a 3b is just not a good spot. If it's DS or SS and connected to some degree then ofc you want to call.

I hate folding to an unknown villain when I have a set but I think you can def have a population read that people just don't get in 200bb here lightly.

Call now, fold if an Ace comes and the gas is still on.

I definitely wouldn't fold an average or better KK to the 3 bet, especially deep. As played fold flop unless you'd led for sole purpose to induce a bluff. Played normal barring a read that villain rarely 3bets without AA or is a nit, c/c flop and reluctantly check/jam most turns.

So much this. Villain will probably cbet all his hands that have very little equity against you. I'd guess in theory you should be checking over 99% if not 100%. I doubt you get to check raise this board at all either.

It depends!
There are some weak AAxx- and KKxx-hands....
Strong KKxx I call vs. Villian 3 Bet, also they have AAxx.
I call even with mid-broadway and doublesuited. In my expierience I won a lot with good broadway ds vs. weak AAxx, cause many player overplay their hands and do not care postflop equity.

So, there is no really general answer for me. Strong KKxx hands I call. They even can block nut str8 and nut flush vs. weak AAxx.

On this level/limit it is more important to play a good postflop and be tight preflop, but I would not fold strong hands KKxx hands.

If you say it is 90% AAxx...trust your instinct. You do not have the nut-3-of-a-kind and no possibilities. No gutshot, no fd.... or other points/are the reason to fold.

Do not care how "stupid" somebody play somebody AAxx hands. Call vs. bad regulars, who can not fold this hand and go broke on flops, where AAxx hands had a low equity vs. your hand.

I even fold some AAxx hands preflop or do not 3 bet them. Depends if they are suited and the two other cards.

fold pre. If not check call any size bet. Then on the turn check fold to large bets or any bet on flush cards. Check call on smaller bets. And river same thing.

The exceptions for me are, if I have the K high possible flush draw, I look to bluff some of the time. Or if I have some of the straight blockers and a straight card rolls off I might look to bluff some of the time. But this is usually only against the players I know are capable of folding big hands to big action.

As played Bet fold is good. His betting is repping what he is telling you he has which is AA. And you should just believe him and move on.

it's hilarious how people try to analyze the hand without knowing the KK side cards
KKAx and KK72 makes vast difference in decision preflop and on the flop