Two things!
First of all, this is becoming well known among the AO3 community, but I thought I'd share it here. In the last few weeks AO3 has had a number of spambots running around leaving hate comments. If you get one of these on a story of yours, just hit the button to report spam, and move on. One person I was talking to suggested the bots are either (a) training some sort of AI and using your response as training data, or (b) copying the text of authors' works and then trying to harass them into deleting the work so they can then upload it under their own creator's name.
I've gotten two types. One was a condescending message with "lots" of sarcastic "quotation marks," claiming the "commenter" had doxxed me to my "employer" and hoped I was really "proud" of my "bold" writing choices. No such thing had actually happened, of course. Though, frankly, if my bosses actually told me they found Demon Hunting Takes Balls of Steel, and plausible deniability was no longer an option, I'd just tell them to read it, given it's some of my best writing!
The other version was basically different variations on this formula. "I loved your writing and characterization, but I'm super bothered by the fact that you didn't include [insert marginalized group] characters in it. I've added your name to a list of [highly negative ideology or organization], and I won't take it off until you include a character like that."
The funniest part? One of these spammers told me I was being fatphobic for not including any heavier characters... on a story that specifically mentions Sui's self-image issues and even has Mikoto say that maybe she should "lay off the croquettes a bit." The bots, of course, don't actually read the story. Like I said, report and move on - AO3 will even delete the comment for you automatically when you do.
Anyway, with all that being said, DHTBoS was not the only Inyouchuu fanfic I wrote. It was preceded by A Black Cat in Faraway Town, and while there's very, very little overlap between Inyouchuu fans and OMORI fans... somebody had to bridge the gap.
That being said, it was a rickety bridge. I had an idea and went for it, but I didn't know a ton of lore at the time and missed a ton of opportunities I could've explored. I was also very nervous about going too dark with it - OMORI was historically notorious for fans dogpiling hate on creators who dared acknowledge that Aubrey is kinda hot (you know, because "she's underage!!!!1!") - so the flesh-cave scene doesn't even get to the point of tentacle penetration.
Even so, a few people genuinely did enjoy reading it. Honestly, I have a few notes written down on how I could redo this idea way better. Just a matter of when I might have the time and motivation.