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’m a big fan of this when the artist isn’t currently engaged in harmful activity. I have no problem rereading the Harry Potter books I already paid for, but I can’t buy any of the new media when she is so actively using her resources in what I see as a negative manner.
This rule applies to me, based on my values. I’m not saying other people are bad for continuing to support the HP universe, just adding my two cents on the idea of death of the author.