"Everyone I met in this predicament, it was due to severe mental illness (like, schitzophrenia, etc) or a severe substance abuse issue." I understand your situation can be incredibly stressful, but have you been evaluated by a mental health professional? I see quite a few disconnected thoughts here that I'm having trouble making sense of. In addition notions of being persecuted, discarded, etc, esp. linked to taking…
I would say the same. I don’t get any schizo vibe, though. Only a great deal of feeling victimised.
>> am I just a signal in the noise to be discarded when I'm no longer useful? […] Why won't anyone help me?
It sounds like you feel abandoned by your family and that this keeps you in such a distressed state that it prevents you from operating.
It may be that you are quite alone in this world right now. I would suggest finding someone locally that you can connect to, who can guide you to a path where you feel emotionally secure.
If this is how you enter a job interview, you need to cover your bases in Maslow’s pyramid a bit more. I understand the dichotomy, but the root cause is emotional, not economic.