you have aces, but you don't have great aces. your cards aren't very coordinated and neither of your aces are suited. however, i think you could argue calling or raising preflop here.

you'd be raising for the normal reasons: you most likely have the best hand atm and it's generally a good idea to raise preflop in PLO with the best hand while you have that marginal advantage because you want to be putting as much money as you can in while ahead, and you want to be building a pot.

on the other hand, your aces aren't great and you don't have a lot of redraws. with hands like this, i don't mind calling preflop sometimes. it disguises your aces and i think it's good for your reputation that you can sometimes call and show up with aces (i.e. you're not insta-raising with aces every time you get them). one reluctance to just call would be that there are still people left behind to act. i normally like to just call in position as calling here could most likely lead to a few callers behind and our aces, which were once so-so, lose even more value.

so specifically for this hand, i'd probably raise pot preflop here mostly due to our position.

as played, SB reraises and it's back on us with 2 other callers. you can't be reraising now, and folding would be horrible, so you're stuck with calling.

on the flop, all three villains lose their minds. you missed pretty much everything. easy fold and move on. doesn't matter that you would have won the hand.

think about it this way: preflop and 4 way - you are around 23% to win the hand. you are actually even behind the 5428 hand who's at 31% to win. on the flop - your odds did increase, but you're still only at 29% and you're still not the favourite to win the hand. 3 all ins before you? you didn't hit your ace? you're done.

on a side note, i play omaha zoom but only on the lower stakes. if i'm sitting at $25 buy-in or higher, i'll sit in the normal 6max tables. my reasoning for this is that i find the lower level zoom very easily exploitable as you have players who don't play omaha well and they don't adjust to zoom properly.

however, at the higher levels, they tend to be less exploitable as far as zoom strategy goes, and they tend to be slightly more competent at omaha. therefore, i feel that the value is a lot thinner in the higher zoom buy-ins. this is just my opinion obviously, but i personally prefer to sit at the table with them where learning their style is a lot easier.