A bunch of people who didn't inherit a franchise also complain about "toxic fandom". What's the problem with saying that? Do creatives have to butter up their fans?
I know the cases you're referencing, and I don't disagree with you that "toxic fandom" was a fake complaint in those specific cases. But it's not the writers who use this to deflect from criticism, it's the investors behind the scenes. The writers (the ones that are part of the normal work force) want to write good stuff and create good entertainment.
But, say, the actress of Rose from Star Wars? She has every right to complain about a toxic fandom. Christ, they sent her death threats because she performed as asked for by the studio!
> Then game of thrones proved it was possible to make an adaptation that was both faithful and good cinema
.. up to the critical point where they couldn't be faithful because GRRM hadn't written the ending, so they wrote one which everyone got mad about.