My father is very strict. He doesn't really support my physical, and emotional needs.
OH, I'm sorry to hear that. Do you still live with him?
Yes, but I would rather my legal guardian be my aunt, uncle, or other family member.
I understand. Have you expressed this to any of your family members? Do you see a therapist? 
No, my father isn't even what you would call a "good-enough" parent because my health is deteriorating under his care.
I would suggest calling child protective services. You need to talk with your aunt or uncle..someone you can trust. 
My mother was a good-enough parent because she adapted to my needs when I was an infant, but she died early on.
I am so sorry to hear about this. Please get the support of your family members. Then get into some counseling. The sooner, the better. You do not deserve this.