This was somehow a few notches darker than I'd imagined from the description.
With regards to people talking about illegal dumping laws... Yeah, it doesn't make sense in terms of how primitive their culture otherwise seems, which makes me wonder whether there's going to be a good, a bad, or no explanation in the future, given how prominent it seems like they're going to be.
(One could think up "good enough" explanations really easily, like if certain unfortunate monsters tend to take up in dumps. Or, there could be more fundamental reasons, like: Maybe magic means productivity is high enough that they have some of the same waste-production issues that modern humans have... But does the author even care? Well, we'll see.)
That said, this one looks like it might still be quite good even if the world-building is nonsensical, so long as it keeps the focus on the characters.