My brain isn't "on" 24/7. Depending on motivation, there may only be a few hours a week where I have enough brain power/creative energy to think critically about technical problems.
I feel like if my job were just to cut wood in the forest all day, then I'd be golden. I have the physical energy to do any monotonous task.
So how do you guys deal with it? I'm a "Senior DevOps Engineer." I'm getting to the point where my job makes me feel numb. I've already tried switching jobs twice. And I'd love to leave forever, but I don't want to lose my paycheck.
Right now, I'm a paid professional and just want to deal with getting _something_ done.
Listen to yourself in terms of why you believe you're not functioning like you think you should.
I have about 3 to 4 hours a day, twice a week, of top-level cognitive bandwidth.
That's it. The rest is idle to a degree where I can do shit for brains work and help others.
But really heavy load work takes its toll and also takes a lot of mental capacity if the domain i work on is complex, relatively to what just accomplished. Hence context switching is hard.
One practical thing is to write a journal with the things you speculate about. Just sentences. Write it down and continue. Write. Continue.
It's a good way to have that kind of valve.