Well, it's hard to say exactly who writes 'bled dry fanfic'. It could be a group of fans who are into exploring more extreme or less - explored themes in their fan - created works. Maybe it's someone who has had personal experiences related to feeling drained or exhausted and they translate those feelings into their writing in the form of this type of fanfic. There might also be some established fanfic writers who, for a change of pace or to experiment, decide to write something like this.
In the world of fanfiction, anyone could potentially write a 'bled dry fanfic'. It might be a new writer trying to make a name for themselves by coming up with a very different and thought - provoking concept. There could be veteran fanfic writers who want to break out of their comfort zone and explore the darker side of the characters or universes they love. Additionally, it could be a collaborative effort among a group of fans who share a common interest in exploring themes of extreme loss and exhaustion in the context of their favorite fictional worlds.
There could be various authors who write 'bled dry fanfic'. It might be an individual writer with a unique and somewhat dark or intense writing style who is interested in exploring themes of depletion. It could be a relatively unknown fanfic writer within a specific fandom community.