The problem with online dating is that women are very picky because it is easy for them to get matches. Research shows that women on average match with a guy that has an SMV about two levels higher than them and men have to go down two notches. A guy may swipe right on a woman but eventually the woman has trouble getting his attention because of the disparity in SMV. There is also research that shows that most of the matches are made with 10-20% of the guys. So, the guys that women match with have a lot of choice on who to move forward with. The ones that the woman has a realistic chance with is swept left into oblivion. G, I am not saying your standards are unrealistic but this is generally the case according to many studies. Often, the bias is in the subconscious and influences swiping behavior of men and women without them even realizing it.
I doubt the picture had anything to do with it. It is more likely that he was on the fence and finally decided to move on. If it was indeed the picture, then I would be worried about his mental makeup and block him.