To ease the struggling stage my biggest win was acknowledging what is the minimum actions needed to take to keep coasting, Once I accomplish those things I didn't beat my self up. Examples of this would be acknowledge 6 hours of meetings in a day is a full day, and I don't need to do 6 hours of dev work on top.
To start the healing process I quit my fulltime job and took 3 months off. After that I started contracting instead, billing hourly, and working less then 40 works for my budget and the strong disconnect between working and not working is helpful to me.
I would ask your self the question, do you need to `fix "everything"`. Sounds like a lot of pressure to put on yourself, maybe you need that pressure, maybe you don't.