struggling

Had to quit a fast food cleaning job just after Christmas because the rota was being changed after it was published regularly and without notice. I'm now claiming Universal credit and really hating myself. I always get into a over-achiever- burnout cycle which means my jobs in the past have never lasted more than a few months. I want to break this cycle and find long-term employment. I've just gotten into a new relationship last year and moved out of my parent's house to Scotland. I really want a fresh start but my partner also has autism and adhd so I'm picking up the slack round the house most of the time as she doesn't have any self-motivation and has executive function issues. I'd also like a child in the future but just feels like I keep going nowhere and will never have the resources. I can't force myself to continue working when I'm in burnout (partner is on disability) but I can't live on benefits for the rest of my life neither...