I admire your courage and resilience. Nothing you have said about what your father is doing or what your mother is not doing (to protect you) is normal. To answer your question — you ARE NOT the crazy one here. You are 16 and no child should have their hair pulled and head slammed against the wall. No child should be verbally abused by their parent. If the only way you feel powerful is to cut yourself or not eat, and have to remain uninvolved while he throws a chair at your sister, and hide in a closet so you won’t be seen — something is not okay with him and your mom.
If you have been to family therapy I would call the individual who did the therapy because that person would have wondered: Why hasn’t your mother protected you? Why does your father say anything about your body? How is it that he is allowed to continue to terrorize you and he not be challenged by someone? Let this person know what is happening to you now. They can help you.
There is also good treatment for teens with Borderline Personality Disorder (BPD) that you can find here.
You may also want to contact any one of these services that are near you.
You have done the right thing by writing to us here. I highly recommend you contact the family therapist you had seen or one of the facilities on the list. They will help you deal with what is going on and become safe.
Wishing you patience and peace,
Proof Positive Blog @ PsychCentral