re: Poker & OH/8 Hand
Trips should generally be regarded as a drawing hand - so on the turn you've got 7 outs, and on the river you've got 10 for improving, because straights and flushes are extremely common in Omaha. The flop gave both a straight and a flush draw.
On the low side you were nowhere near getting the nut low (you'd have needed 2 good cards for that), and with 2 cards to come there was a pretty substantial chance you'd end up playing to win at best half of the pot.
Yes, you were in the lead at that point, but there was little chance that you were favourite to win, with all the draws. You had a fairly substantial chance of losing the high hand to a straight or flush, and a high chance of a low being possible which you almost certainly wouldn't have won, so you had a fair chance of being scooped, and not a good chance of scooping yourself. That's the kind of situation you don't want to put yourself in.
With trips, you can bet on the flop to try to take it there and then while you are ahead. If you get played back at, you need to realise at points like this that the current leader isn't necessarily anywhere close to being the favourite in this hand, and would probably need to fold. Alternatively you could have checked and called the bet to see what the turn held, because if it paired the board, you could then play more strongly, and if it was a high non-diamond you could consider playing again. In this hand you'd have then hit
the 2 and realised your hand was one-way only and vulnerable, and could have got off the hand there to a strong raise.
The other thing to note is that with $11 in the pot already, when the player only had under $3 left in their stack, they had to call with any kind of nut drawing hand because of the pot odds
, so the raise was never going to scare them off, and that would be the main reason to raise with a hand like yours.
Even in HoldEm the current leader can occasionally be the underdog to win on the flop, but with PLO8 when there's the low hands to consider as well, and the multiple combinations of hole cards useable, you can be not just slightly but significantly behind despite having the best made hand.