A few years ago, the press Jason Arday had over this would have been a restful fortnight off for JK Rowling. Seriously. If you aren't aware of the hounding she's had, for years, it's because you didn't notice it, not because it wasn't happening. Even now when things are (a bit) less bonkers random actress on the new HP feels the need to publicise that she completely disagrees with JKR about transpeople (I'll give random actress a diamond bracelet if she can name one thing JKR has said about transpeople btw). JKR has spent years, not weeks, being vilified and attacked for things she's never said, and it hasn't caused her to kill herself.
I can totally believe that Jason Arday said he couldn't go on (and what did his friends he said that to do? Get him under the MH crisis team? Pay for him to go to the Priory? Or nothing?) But saying his death was caused by hounding in the press is assumption. In my view it was caused by him being a narcissist who went into ego collapse when he couldn't control the way he was viewed and spoken about, had lost his prestige role and the support of Cambridge, couldn't see a way to gain control back. That's my assumption from what is known at the moment.
I'd guess an inquest will likely apportion at least partial blame to the media, repeat the (unsubstantiated) line that he was vulnerable and autistic, and gloss over his and Cambridge's behaviour. We'll see.