If you don’t like your job, how do you cope?

I have two children with special needs and my job allows me flexibility to drive them to appointments, therapy, and even homeschool. It doesn’t pay me much but the flexibility is priceless for our family. Lately they’ve given me an ongoing task that is completely unrelated to my credentials and the area that I was hired for. I understand I have to do what they request or find another job, the problem is what another job would mean for our family, so right now I have chosen to stay at this job, but my souls is crushed. I am not trained for this task they’ve given me so I’m not as good at it as I am in my area, I don’t like it so learning about it is so hard, and I hate doing this thing I’ve been tasked. I went from liking my job to hating it. People who don’t like your jobs, how do you cope?