This basically becomes a catalyst of her moving out of the forest (the story can't have the MC just hanging around in isolation doing nothing but herself all day lol). Neil isn't actually responsible for the creepy people coming to her house. MC gave Coco (the little girl) the medicine and a couple of potions, mom instantly got better taking the meds and one potion. Then mom and dad sell remaining two potions to a travelling merchant (parents were happy they got some money, but Neil knows that they got grifted BAD because MC gave them intermediate level potions which are rare). Then the merchant sells the potions to a higher up, and it caught the attention of the ruling Lord of the land who demands to capture the person who made them.
So MC puts her house in storage and leaves the forest with her two wolves lol.
Neil and his family are annoying as heck, but he's not a bad guy. Initially the reason why he kept visiting for the medicine was because his girlfriend was sick and he was desperate for the cure. Then when Coco gives him the medicine and tells him to leave MC alone, he realizes how rude he was and keeps trying to apologize (which pisses off MC even more). Eventually it grows into a crush (although he doesn't really realize it himself). He's still annoying when MC runs into him later, but at least with context, he's not evil or selfish, just stupid.