I'm disabled, should I keep trying to work a job even though I keep failing at work?

No.  Give up on your dreams, Susan!  Just blend in.  Let somebody else win!

If you wish to continue eating food, benefitting from warmth in your home and clean water coming from your taps and you are actually capable of doing 'some form of paid work' then YES you should be doing that - not just for housing, food and warmth but also for your own self-esteem.

Ask you psychiatrist for his/her professional opinion on your situation.

Without knowing exactly what you have done and what hasn't worked it is impossible to say.  Have you tried limited work (ie 2 half days) or only full time?  Have you gotten help from vocational rehab?  Have you tried work you really like?  Have you tried working with a job coach?

I wish to have an employer at this point that would allow for my, fine one day. Useless the next life I have. Only have a few hours on a good day, never know from one to the next whether or not I'll be able to move or not. If you have an understanding employer who is OK with the uncertainty of the situation, God bless man, hold on to that job. At least you have one.

If you give up, you become an invalid for life. If you keep fighting to improve, you could have a great life ahead of you. Keep going. 

im on ssdi myself, i used to lose jobs myself so now that im on it i wont look for jobs, cause i know people wont keep me and i dont want to put myself thru that

If your mental health problems are getting better, try to keep your job. Seems sensible, right?