I’ve seen people talk about actors and artists that had a terrible time.
My own would be Anne Rice. She wrote Interview with the Vampire after her young daughter died of Leukemia. Then her husband suddenly died of a brain hemorrhage. I suspect her Christian, anti-fanfic phase was a result of mental illness and manipulation from the publishers, although I don’t think she ever apologized.
See: Stephen King’s continued defense of the child orgy scene and everybody loves him. Just the idea that he could be a pedophilic himself never surfaces. Would not be the case if this was Rowling.