Struggling with jobs

I was diagnosed in 2019 with autism and adhd and always struggled to stay in permanent employment. When my employer at the time was notified they completely dismissed my needs (I initially applied as a craft room assistant but they kept putting me in a busy shop shift at the weekend) and I eventually started ringing in sick. They knew about my grandma dying at the time too so there was a lot of change. 

my next job was a support worker for children with autism and complex needs etc and I was discriminated against greatly! I eventually left and did a formal grievance procedure. My job after that was an absolute mess, they didn’t inform me they were an agency, they regularly took shifts off me and I was working 18 hours and only being paid for around 10. 

im now so scared of getting a job and nobody seems to understand, my family aren’t supportive and even the lady I have working with me to help find jobs isn’t doing her job! I’d greatly appreciate any advice or even hearing people’s story’s.