It's more than emotional abuse. Abuse has elements of emotional, physical, sexual and/or also neglect aspects.

I'm sorry you regret posting, perhaps you were a bit detached when you did so. You do need someone to talk with, if there's no one there, like from school, then you might find a therapist online who can help you get through this.

No one should be locked up or treated that way. I'm sorry your mom isn't there for you, and isn't being a loving mom. That hurts in itself doesn't it?

You've done nothing wrong to deserve that stuff... don't let yourself think that. You don't have to be ashamed of how you are being treated by adults who should know better. You aren't an adult and aren't expected to be able to figure this out on your own. Are there any phone numbers you can call to talk to someone anonymously?