76s Anything to consider here?

You have the top end of the straight. With him calling flop and turn would guess maybe flop ed a set which would make a full house on the river. Maybe a larger turn would have got him to fold if he did have a set, however the straight has been there since the start and he has still been calling so probably was going to call again regardless of size. The river is the tough one with the board pairing. I think I probably would have still gone guns blazing like you did. But don't think it is quiet right....

X/c river

X/C OTR is very bad. You are OOP and if you check OP check behind with worse and if he bets you still have to call allin, becouse pot is $4.42 and OP's remaining stack is $3.29. So shove on the river is much better then X/C.

Why would you check/call river? Against FH stack is gone anyways, and what bluffs can he possibly have here after calling turn over pot sized bet? If he has OP he's clearly not going to fold it anymore, but is going to be happy for free showdown.

I´d 3 bet PF. Then keep cbetting.

How about betting something like 1.80$ OTR and folding to a raise? If villain has air he will fold and if he has overpairs he will often just call, but here he reps sets that just improved to full house or quads and we can save a couple of dollars when we fold vs his raise.

And save 1.40? Neah.

So what is your suggestion?
Is it fine as played or should we check fold and let him bet with air, A2 or JJ for example?

Fine as played.

turn I bet slightly less there aren't draw, you don't need protection and i dont want scared oppo and anyway you have psb river