I find it really good but if you don't like rationality/EY it's really easy to latch on as something to hate (overly smart fanfic does sound cringe on the face of it).
Also it's a Harry Potter fanfic.
That they paid $28k to distribute to others.
I'm sure the return on that investment was very large in terms of donations.
It's great - there's just a group on HN that think it's status-y to hate on it.
Ehhhh it was fine when I read it as a teenager but the writing quality alone (ignoring the content) certainly did not age well decade+ later