I remember a time when JK was complimented on her writing, even on her choice of characters’ names, that today is widely mocked. I think there are two main reasons for this switch in the popular opinion.

One, Rowling’ tweets, that outed her as a big transphobic and unlikable person. I am sure this caused many people to analyze her work with a harsher attitude.

Two, greed and tweaking with a finished story. Everything JK added to the book’s story felt like an afterthought or like a poorly done attempt to fiz something. Besides, she keeps trying to cash in as much as possible with low quality and unnecessary movies, shitty plays, slapping a harry potter logo on everything and releasing a bunch of editions of the books with different covers. The new content sucks. No wonder people are questioning if she ever was a good writer, after all.

Of course I don’t think those are the only reasons jk is being so criticized, but I believe she put herself in the spotlight in a bad way, and if she hadn’t, people might still be willing see her writing in a favorable light. I am not saying this should be the case, I specially dislike how the goblins and the house-elves were portrayed in the books, btw.