For anyone about to read the article, it is A LOT. Like, I don't have any particular triggers and I had a hard time reading it.
The CW itself almost needs a CW, so I spoilered it here:
spoiler
CW: SA, Physical abuse, non consenting bdsm, child abuse, humiliation, corrective SA
If you don't want to read it, the TL;DR is that Gaiman is a monster