I mean I worked at Safeway, Trader Joe’s and a bunch of other terrible jobs from age 15-27. Low skill labor/service jobs are not bad at all when you don’t have much context. Sharing one bathroom with 4 roommates who party constantly would be a nightmare for me now, but as an 18 year old who it was a paradise.
It’s all relative, and you are viewing their jobs through the lens of an engineer making 6 figures.