At the risk of *really* being perceived as too negative (or maybe I just had too long a day today):
Over the decades and with a variety of employers, I have found that nothing ever really changes. You have to take charge of your life. You have to decide (not just acquiesce) whether the physical, mental, and emotional toll is worth all (any?) of the good things about the job (including, obviously, the money).
I have walked away from a job that paid me more money than I had ever made in my life (to that point) but where I was often eating Pepto Bismol as though it were candy without another job to go to and with no prospects for one. Within just a few weeks, I was physically and emotionally healthier than I had been in months, even though I was unemployed.
It took me years to recover career-wise from that decision. Being unemployed (or under-employed) is not fun; it's not pretty; it doesn't build character. You endure it and, to the best of your ability, move on with your life. It can be done. Life is too short; there is no reason to be miserable almost every waking hour.
I have never subscribed to a "yeah-rah-rah" (cheer-leading) attitude or approach to anything. I realize that I am a pessimist, but all of my surprises are pleasant ones.
Joe