This is classic burnout. I would set timers like start work a 8:30 AM, take 10 minutes breaks every hour or two, eat lunch away from your work, and stop working

This is classic burnout. I would set timers like start work a 8:30 AM, take 10 minutes breaks every hour or two, eat lunch away from your work, and stop working at 5 PM. Set boundaries and stick to them.