Played optimally. I usually bet smaller on the flop but your big bet elicited an AI so it was perfect against this opponent. His AI is not surprising, he just did it against a set but it’s not easy to put you on a set. I do not fear a higher set here, I’d call easily. With the flush draw on the board I guess betting the pot was a good idea given that he could hold AKs, AQs and such. He might also push AI with those given that he has two over cards plus a flush draw.