Yesterday afternoon 1/2 poker room
Table full of fish who like to gamble and see flops, some deep stacks and lots of straddles
H old wm viewed as nit/TAG in LP1 with stack of 130 and p KK
V in young latin wm LAG MP1 and has H covered.
PRE-FLOP
Couple of limpers to V
V raises to 10
2 folds to H
H considers raising but had position on V and knew he would cbet. Thought he might fold to a reraise. Put his range AA-88, AKs-AJs, AKo-AJo.
H calls.
2 others call.
FLOP KJx r (Pot 39)
V bets 25
H puts V on pAA, QQ, JJ, and less likely AKs-AQs, AKo-AQo
H considered calling because H had position but was afraid 1 of 2 left to act might have pAQs-Q10s, AQo-Q10o and did not want them drawing
V considered raising more or shoving but did not want V to fold
H raises to 50
folds to V
V shoves (has H covered)
H shoves

How should this hand have been played?

By playing deeper.

yes, play deeper.

I'm 3betting this preflop 100% of the time. I don't want to play multiway with KK preflop, and the risk of going multiway is high because the limpers will flat after I flat.

Yes, everyone may fold. If everyone is folding to 3bets, then you're not 3betting enough.

If you get a caller or two, the SPR is now low enough that it doesn't matter what you do postflop, as long as you don't fold. (with the exception of an ace coming on the flop).

I RR to 48, shove flop. I dont see how you have a fairly tight range for a LAG villain, but with so many fish alot of times a 3b is called. Calling here means the limpers are coming along and you get cracked usually. Just do whatever gets stacks in vs 1 or 2 opponents.