If your family acted as if they didn’t want you or treated you like an outcast it would be best to disown them and move on with your life?

Yes.. but over a period of time.. make use of all the abailable resources as they are bound to support you.. and syart building a life outside which you can move into later..

Most get emotionally upset and jump into an independent life without much thought. Rentry then can be a problem. If you are an independent earner, start paying rent n expenses.. just like how you would outside.