As others have said the number of possible hand combos multiway in PLO5 always reduces our equity---in fact on this board we normally would not want to bet on the flop with the hand we hold- we would much rather save the action for the turn when a clean card hits---in this spot of course your V are going to play for pot with the hands they hold on flop. We could be in an even worse spot by splitting the straight with one of them who is also free rolling us with flush cards while the other draws to boats---so 32% is good 3 way all-in in this spot