Sorry to hear that you are feeling in this way. Mental issues are not easily understood by people who never had a similar problem. Many times, these people simply ignore their relatives problem or blame them for the suffering.
Ignoring the suffering a relative is having is the worst thing to do.
I can understand that people don't want to cope with someone mentally ill bc they are not ready to stay with the person bc they simply can't do it but I understand your desperation.

Let me tell you something. I hope it doesn't sound rude but people who leave you alone, it's better they go on ahead with their lives. You will have other people by your side.

In the case of your relatives, you mentioned your mother, was she called to go to see the therapist? Many times, they need a therapist guides them.