Villain is short stacked and is playing 33/33 over 22 hands, which trends towards a weaker player, but not enough hands to get a conclusive sample. Villain also has an AF of 0 (never made an aggressive postflop action) but again a very small sample.

34s is at the bottom of my opening range but with a trending weaker player in the BB this is a +EV open.

gutshot, fd and no SDV so this is a perfect bluffing candidate. We don't want to bet small with range as this board smacks BB range but we don't want to overbet because villain can have a lot of nutted hands so a 70% bet seems adequate.

We make the flush and continue betting. BB effectively min raises and from a passive player and population tendencies this trends towards very nutted hands. I think villain will raise sets and 2pair+ OTF so this is either 87, 88, flushes or 9T. Should we be 3betting here?

Villain pots on the T river. With flushes and 4 to a straight I don't think villain will do this will 87 or 88 and his 9T combos just got reduced. Villain still has all his flushes. We need about 35% (after rake) to BE and if villain does this with his Add, Kdd, Qdd, Jdd and T9 we have about 39%; however I don't think villain bets all his T9 at this size with 100% frequency, instead preferring a smaller sizing/check as he chops with 9x, however this is a size that all flushes would use to get value from 9x.

Is my analysis sound? Was this fold too nitty?