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.
I fear the reason TWOW and whatever book 7 is going to be is being frantically reworked, because he realized that whatever arch had the show ending like it did doesn’t make sense for the characters at all (especially since the books have multiple other factors that will change how the ending comes about)