For me, the big slow moving org CAUSED the burnout

Burnout isn’t always about overwork. There are several different typologies and mine was more related to a lack of control/pointlessness that led to a very extreme form of ennui. The end result was the same with depression, anhedonia, and cynicism.

I feel this way too to the extent that I am willing to take up a non technical role as well. Just want to be like a no name machine at my desk, alone. do my time, leave on time and then be free to live my life as I please... but I don't think large places are devoid of their own BS. They have lots of fluffy rituals that wastes a lot of my personal time and energy.