I would go with job A and downsize living expenses if possible.

I would rather work a job that I love for less hours and pay over a job that pays more that requires me to be miserable 40 hours a week. If needed, I could get a roommate or find other creative ways to downsize my living expenses to live comfortably.

Also, you could do what I do and donate plasma as an extension to your income. If you have a Grifols based plasma center nearby, you could donate 8 times per month and make an extra $345 per month which comes in handy. You would also likely qualify for services like food stamps which would further add onto your monthly pay if you work at least 20 hours a week.

There are creative ways to save money on living expenses as I've learned. Sure, they might be inconvenient, but I would argue that they are much preferable to wasting half of your life every week doing something that you hate just to support a somewhat higher standard of living.