*** Well Hero isn't doing what people are suggesting ***
Hero check raises to $50 - that would be a $35 raise into a $62 pot. Villain offers a short speech about having the nut flush, but he knows when he is beaten and folds. {not buying a word of that.} I'd rate villain's demeanor as a vague sneering contempt.
Here is Hero's thinking during and about the hand.
Hero's Preflop is a donkey play. Hero should fold for $0.50 and fold to the raise. This was an impulsive act hoping to be the one to stack the local. I know several of us were chopping at the bit to get a shot. But hero has a hand that often makes a second best low plus only a modest shot at the high in weak position. Those cards belong in the muck.
The flop bet sizing by villain raised an alarm in Hero's mind. That might have been the only time anyone bet less than pot so early in the hand. It seems a lot like a hold'em sized c-bet with A2xx or maybe AAxx rather than a strong drawing hand. Even so, Hero was primed to fold until everyone else folded first. Hero makes the call already thinking his hand could be turned into a bluff.
The turn brings Hero a nut low draw, but it also makes the flush. Hero would likely fold to a pot sized bet. But that doesn't happen, villain checks behind. I know this villain likes to bet, the fact he doesn't bet the turn makes me restrict his holdings to some extent. There is some evidence villain might not be very comfortable playing Omaha, so I expect him to bet on the turn with "good" hold'em hands that aren't as good Omaha hands.
The river is a brick for Hero and often a brink for villain. Hero elects to give villain a chance to bluff knowing that he is often trying a steal here and that Hero's table image (to villain) is well suited to making a move. Villain's bet sizing seemed weak at the time but in hindsight it could have been going for a thin value bet. Hero feels that the river bet is polarizing for villain. I expected a free showdown if villain has a medium strength hand.
A lot of Hero's thinking in the hand is focused on Hero's relationship with this villain. He has come close to saying what he thinks of Hero's playing style several times and his table talk is consistent in holding a hero as a weak-tight old man, coffee style player.
My primary range for villain is a pair of two or something not much better, something like A2xx.