dealing with difficult clients

hey everybody, i wanted some advice on how to deal with difficult clients. i recently implemented a contract and it did protect me from this escalating but I wanted to know how else I can go about this from anybody that's had to deal with this or been in the game longer than I have (I'm relatively new).

So I took somebody's portraits and they were wearing a revealing dress and it was windy outside. As a result, I extended the time we took photos significantly, and overdelivered 2x over, and they were still upset. I suspect they're upset about the dress being revealing/having regrets about it because the client said that they are "upset because the dress did not flatter them in the way they wanted" and blamed the wind. They said they're unable to share the photos with their family members. However, I honestly did look through them and there was only 1 place with major wind issues, and the rest there was no issues. It seems that the main issue is that they regret the dress they chose after viewing the photos.

How would you guys go about this? I just hate dealing with difficult clients because then I start getting in my head about my own work

Update: It was only slightly windy in one place just to preface!! There was wind, yes, but to be honest, we avoided the random moments of wind. They just mentioned the wind.