[Aceium]

Yes, you missed out on a lot of value here. I would bet a little more on this flop, and then bet again on the turn. If you get called in both spots you might start to worry. But this river completely bails you out of any misgivings you might have about the hand.

You should be betting this river every time to try to get value out of a straight. If villan is really weak-passive, they will still probably call a bet on the river with a straight instead of firing a bet themselves.