Prima, $0.05/$0.10 Pot Limit Omaha Cash, 5 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $11.28 (112.8 bb)
Hero (BB): $10 (100 bb)
MP: $11.59 (115.9 bb)
CO: $13.20 (132 bb)
BTN: $90.54 (905.4 bb)

Preflop: Hero is BB with K A 5 A
2 folds, BTN raises to $0.35, SB calls $0.30, Hero raises to $1.40, BTN calls $1.05, SB folds

Flop: ($3.15) 9 2 3 (2 players)
Hero bets $3.15, BTN raises to $12.60, Hero calls $5.45 and is all-in

Turn: ($20.35) 9 (2 players, 1 is all-in)
River: ($20.35) 5 (2 players, 1 is all-in)

Results:[spoil] $20.35 pot ($0.30 rake)
Final Board: 9 2 3 9 5

I think this is a standard stack off, I have an over-pair and a gutshot in a 3bet pot and spr is about 2.5, villain can have some pair+draws ect where I have 42% equity (as in this case), jamming is the only way i realise all this equity and can also get some folds on the flop
My question is, when should I not be stacking off? With just a bare overpair oop should I be looking to stack off in 3bet pots
Vs. wide ranges should I not 3b AAxx, that seems like a mistake. I constantly find myself in close spots postflop with bare aces oop and struggle to know what to do
All feedback is appreciated

1) You should bet less because your range shouldn't be just AA. You generally don't want to be betting AKQJds for pot here, for example. Even JT98ds isn't just lol I hit top pair let's put another 86bb in.
2) You should bet less because when you only need 25% to call it's hard for you to be bluffing (or bet/fold marginal hands) on the flop, thus. it's hard for villain to bluff raise random diamonds.
3) The 5 is ok but doesn't make enough difference on how I'd play the hand.

As for pre. 3betting this is ok as long as you have a bunch of non-AA in your range, if you don't then it's probably better to just call to set mine (and sometimes x/call down when AA is probably good).

3 betting is bad imo. Calling is way more +ev. Your hand is garbage and the only flop that's good for you is A hi

So given that Fernando Habegger says the opposite of that I feel it's more likely that he knows something you don't than that you know something he doesn't. Or do you have any theory or citation for that?

And again, if you aren't 3betting enough non-AA hands and thus. you are playing this particular hand almost entirely faceup then a call is better.

3betting might be more +ev for Fernando because he has memorized all relevant postflop equity situations and knows ranges well and can play oop better. I'm certain he would not disagree that calling is a viable play and I'm also fairly certain bet calling on the flop is not something he would do

This is somewhat fair, but: 1) If you are going to learn how to play bad AA, it's probably better to do so at $10PLO than waiting until you move up. 2) It's different advice saying "Don't do X pre." instead of "You probably make too many errors post flop to do X pre. currently"

Thanks for the feedback, and I'm not at all surprised that I am making some giant mistakes in all areas of my game, I have played less than 10k hands lifetime at PLO, and only just started playing (and studying) the format
I 3bet quite wide, more when IP, but I still have more than just AA in my range
If I don't pot the flop, and bet smaller, i.e 1/2 pot then villain jammed, what would I do?
Sets are very unlikely, very rarely he might have top set, but generally will have pair + draws, where I still have a ton of equity(KdQdJs9s vs. AAxx on this flop, AAxx has 48.2%) , and given the size of the pot, I don't think I could fold?
I think that I should stop 3betting crappy AAxx hands in certain spots, i.e OOP as I obviously don't know how to play them very well

You obviously want to adapt your play as you get better and more apt at marginal situations. Overpairs, top pairs, two pairs, and weak draws are going to be the most uncomfortable situations for a beginning player, so it's more ev to play high SPR situations and in position with those hands. Dry and single suited aces are also good hands to include in a calling range as at 10PL most players 3bet ranges will be high % AA

3 betting is fine, jesus. bet call is fine, jesus again.

Youre taking bad aces... AAK5r to a 2.5 spr pot vs a likely bad player. Borderline imo. mashing pot here is terrible, as it makes it easy for V to play his range. I'd either checkjam or cbet smaller on this texture.