From what little i know, hoarders hate their stuff being thrown out. But this is just fiction and didnt bother with that bullshit and just made the mother prioritize the daughter more than her trash.
Doesn't the artsyle look like csm? Especially the mc feels like Denji with that shark-teeth. And the girl in the last page when sge said “blergh it smells” has a csm feel to it.