He seems to have solved a mindset issue that eludes others like myself.

I reduced to 24hr billable hours a week thinking that it would help with burnout. Instead my ego is constantly deflated given that I am now the least productive developer on the team given all others work 40hrs+ and my meeting/coding ratio has become unbearable. The resulting competition anxiety ensures I think about the project all the time. The resulting lack of energy has affected my other projects/interests.

This is 100% in my head as my supervisor is happy with my output. But I can't escape it. I often lie down, stare at the ceiling for answers, only to find myself in a worse state.