Take lots of short breaks doing the exact opposite. Get outside, do something physical, etc. I work from home so this is easier. Stay away from the computer/phone on weekends and evenings. Also coding in a field that you are passionate about or working with people you care about is helpful. A body can only take so much sitting motionless and a brain can take only so much focus before they say, “no more”. You have to create the balance that prevents it.

Chris

You trapped yourself in a box of your own making with the statement, “given my age and skill set”. Unless you’re in a retirement home on your deathbed you can learn, change and grow. You’re just not willing to let go of comfort for happiness. Use the current job to launch your next career. Learn what you need to learn in every free second ( yes you have them) and move on when opportunity presents itself. It will be scary as hell: no risk no reward. Everything worth having is on the other side of fear.

Chris