Hi wnfdiary, I'm writing you from my parent's place, placed in a small town half an hour by walk from the top of the volcano :D
I'm sorry you had such a bad experience over here, and you're not the first person who ends up traumatised by this place. Many tourists find accomdation in the poorest neighborhood in town because it's cheap and then they regret because, of course, they have no idea of how it really looks like. It would probably been easier if you had known that. Anyways you have to fill your backpack with a good amount of sense of humor before coming here and if you look at the bright side (what else can you do except jumping on the first plane to go back home? :D) you can have a lot of fun just sitting somewhere and looking at people acting crazy