Omaha advise please

If you ever look at the maths behind situations like this one (which I'm not saying is a very fun thing to do lol), where you've called a 3-bet pre-flop and you're facing a standard continuation bet - we'd expect him to make this bet, on this flop, with nearly 100% of hands he plays like this pre-flop, then you'd be very surprised how even the smallest amount of "fold equity" makes the maths of these spots really forgiving.

If he is calling your all-in 100% of the time here then actually you're prolly making a bad shove (obviously no-one is folding this hand on the flop here in game) if you expect him to fold, even as small little as 5% then the profit of going all in increases hugely and you actually are making a very, very good shove.