I found this story very unpleasant, and not in an enjoyable-horror way.
Part of it was that I thought it focused on awful lot on Dermot's odd appearance, as though that was very important. I've worked with a guy who looked pretty much like described, and I've often thought about how it must suck to have to overcome people's kneejerk reaction to your odd appearance every damned time you meet someone, and it felt like this story was reinforcing the general attitude that if someone looks a little bit odd then they're probably a horrible person too. So I did find the focus on his appearance frustrating, when he was obviously going to turn out to be a horrible person. (the guy in question was a pain in the ass to work with, but I have no reason to think that he was a predator).
I think that part of it is that there was nothing to hope for, nothing to root for in the story, it was just unrelenting unpleasantness from beginning to end.
Anyway, not my kind of story, I guess.
I don't know if there was any way to avoid this, but it seemed like the story was kindof dependent on the reveal, but the reveal was pretty telegraphed by the trigger warning. I think a trigger warning for that content is appropriate, but at the same time, it pulled that punch. I don't know, I guess it was done as well as it could be done, but I was waiting for the whole story for the trigger content, and since the focus was "What will Dermot's price be?", the most obvious answer was "his price is the systemic exploitation of children as per trigger warning".