IMO this is not fine. I wouldn't open under the gun with ATo. I would open fold gladly. Maybe ATs but honestly I don't like to open UTG with less than say AJo, 66+. Once you have opened and villain called I do understand your c-bet after we whiffed the flop, especially since we are heads up. But this is a very wet board that has a lot of hands that call us beating our range and our outs crushed (by hands villain calls us with) honestly to the point that we are probably drawing thin. And we are only folding out hands that completely whiffed also. We are not folding out many better hands imo. Remember, the whole table folded and Villain called our PFR OOP heads up. So I am not barreling out on the turn. I'm checking back the turn and if we make some sort of hand on the river, ie, a naked Ace, a 9 or a
; I may bet out a smallish amount on the river if checked to us or call a small amount on the river, but honestly it would depend. All in all, don't open UTG with ATo. This hand appears more like a leak to me and we want to plug it. IMO, it would have been ok to check back the flop all the way to the river and try to get this hand done with as cheaply as possible too.