Something similar happened to me too. I switched from working 4 hours a day to 9 in a new job and my burnout healed.

4 hours of bullshitting, meetings, an unclear vision, constantly being blocked, anxiety over a lack of productivity was swapped with 9 hours of clear aims, clear goals and hard work.

It was still not sustainable but it felt way better.

Yeah especially if in-office, or if theres any operational aspects of the role.

It's not like having 4 hours of BS job gives you 4-6 hours/day of free time to go to the movies, gym, spend time with family, cook for yourself etc.

Instead you are tied to a PC bored out of your mind.

The worst thing in life is a lack of purpose and feeling lack of control.

It did mean more free time, but it also meant that the free time was infected with worries and so was much lower quality.

It was easier to put work out of my head in the latter job. Anxiety didn't overwhelm my evenings and weekends. Sunday evenings were restful instead of steeped in anxiety. It felt more like they belonged to me.

When I came home each evening I felt tired in a good way.