How do you guys cope with a crappy job?

I work for a very small nonprofit that has a lot of issues around unclear division of responsibilities, extremely high expectations, and a general lack of recognition or general respect from some in leadership. I'm back at work today following the new year and for the first time, that time off for the holidays has not made me feel any better about it or re-energized to get back into work. It's at the point where I'm actively anxious about starting the day and how a million new things will be dropped on my plate during our morning team meeting, even though I'm well beyond my capacity already

I know the job market is complete garbage right now and I'm in a situation where I really can't quit. So, my question is, how do you guys deal with/have you dealt with situations like this? I'm looking for new opportunities but obviously that'll take time