One too many

Christ, one out is one out too many. Not only do I lose set under sets, I lose set over sets too. "Standard. For FT." I am not a happy camper. UND THEN: Ten-high flush against unknown, of course he has the nut flush. He played it retardedly too, and still won. Overbet the pot on the river when the board was something like Q2QJA. I figured must be Ax hearts representing a boat. I should have folded river, but it looks so much like a bluff: Check/minraise turn, 2xpot river. He was trying to fold the only hand he should get value from.