Death of the Author is a term specifically to describe this kind of situation and not literal, the author has "died" from the work they created, meaning they are no longer required to keep the work alive also.

If JK's ideology and disgusting rhetoric makes you unable to enjoy the work or if you can't lose yourself because it, that's absolutely understandable, and yes there are LOT better works of fiction out there, I don't like HP very much, but I do get how delightful it is for kids who discovered it when they could connect to it.

The thing everyone here needs to keep aware of though, is that the vast majority of great people who are deeply steeped in the fandom, they are not to blamed for Rowling and her success and fortune, NOR WILL PROTESTING OR SHAMING FANS DO ANYTHING. There have been a lot of naive and performative ideas of protesting HP merchandise and games and media, and shaming the people who consume it, the only thing that does is bring more attention to JK's "cause" and makes people who should be allies infight and makes progressive minded folks divided.

We're not denting JK's pocketbook, it's impossible at this point, we're not sending a message by being angry at her, we're not going to impact her in any way unless we start ignoring her. She's a fucking narcissist and she feeds on the contention she's created.