I actually felt the writing was fine. Basically, author uncovers a problem with a reviewer on Goodreads, discovers the reviewer it a troll, contacts them (unwisely), and then stops after unmasking this fraud to her publisher friends.

Unfortunate state of affairs, but not unexpected given that it has its own name 'catfishing'.

The TLDR is that an author confronts her critic. Just like the title says!

But what's the relevance? Why do I care? Why is this important? I'm looking for a broader context.

I have no idea why you'd care. Some people read things just for the experience, "maybe this will be interesting, let's see". Then it is or isn't and they move on.

I liked it.