Best of luck. I had my mid life crisis 10 years ago. Advanced degrees and lots of management experience did not take me to that executive position i wanted. Probably most of it was not wanting to move anymore because I love where I live and my wife's career is going so well.
So I settle and am working for retirement keeping my eye on the end of the tunnel. My job can be very stressful and demanding at times and I am on my feet most of my shift. No food breaks I eat at my work station. But it is steady, pay is good and every once in a while I can make the difference in someone's day. So I put up with the bad so I can enjoy my free time and prepare for later in life.
Hang in there and best of luck.