Burnout.

I'm tired man. Really tired, I can't keep this up. I shouldn't even have started, I should have said no. I'm burning out faster than I'd like and I'm seeing the symptoms.

"Burnout is caused by stressors that a person is unable to cope with fully. Occupational burnout often develops slowly and may not be recognized until it has become severe. When one's expectations about a job and its reality differ, burnout can begin. ^[1]

Symptoms of burnout include dysfunctional attitudes towards work, exhaustion, loss of motivation, distress, and feelings of ineffectiveness"

Yeah, that's a good description right there. Additionally, absurdly long hours also don't contribute well to this feeling. I don't really have much else to say right now, I'm just too tired.