wa'alaikum as'salaam,
Black magic is haram and an act of kufr. Children have rights in Islam as well and not just the parents. Parents should fear Allah and give children their rights or they will be questioned on Judgement day. Regarding your family, it seems everybody is busy in their own mess to care about you. I don't know how old you are but rather then looking for an easy way out of killing yourself or feeling cornered and no where to go, perhaps you can look at it differently. The positive to this is that you understand your situation and the problems you have (anger management, self-confidence, self-esteem, etc) and the problems of your family. So you already are of to a good start. Rather then looking for their validation and approval or help, why don't you focus on yourself instead. See where you are and write down the goods and bads of it. then see where you would to be and what it will take to get there and then make small goals towards achieving those.
For example,
1. anger management issue
- self-reflect on what causes you to have anger
- research ways to control one's anger
- devise a plan and steps to control it based your research in context of your situation
- make small goals, measure them
- failed goal : why? what went wrong? how can i make it better next time?
- achieved goal : what went right, how did i manage it, how do i feel about it? set the next goal.
etc.
Do the same for your anxiety, studies, sensitivity, self-esteem, self-confidence, dealing with parents and siblings, managing difficult relationships , etc.