5-6 hours a day biking in -15C snow with wet feet (Mailman).
8 hours a day moving chips one by one in and out of an EPROM writer because it was cheaper to have me do that than pay the extra 2c to have them preprogrammed. The chips were 25c without programming and 27c with. (Ericson subcontractor).
And I am privileged as hell, coming from Sweden with a good education and a family I can rely on.
I think the point of burning out on work is relatable still. It is not fun to work long hours of anything, and it is even less fun when something you used to do for entertainment turns into a chore. But I'm pretty happy with my desk job in the software industry because the other jobs Ive seen have been a lot less nice.