I walked out of teacher training (despite good reports) because it wasn't for me and then did four years in retail. I'm now a low ranking civil servant and my life- and job- is a LOT easier than retail ever was. Teacher training was probably the most unrelenting in terms of hours actually worked vs contracted but I think because I wasn't happy I felt disconnected and switched off quite easily
although I was permanently unhappy.
First year in retail was fine- working short hours, no weekends, not too physical, some downtime, feeling good at something after hating teaching and feeling happy again, but the just over three years in the management were much harder and trapping than anything I've ever done and it's hard to switch off from.
If you work full time - which mgmnt usually do, you have no life. You work weekends, earlies, evenings (I once got put on "permanent evenings" for a few months and my mental health nosedived as I couldn't see my friends for more or less the entire time) and as Pp have stated, you're "on call" on your days off if there's an emergency. Yes, I know other jobs do this too but they pay better- we weren't paid much above the staff. They expect A LOT in return. If you're unlucky enough to be on a work whatsapp group- especially a management one which might cover your whole trading area, you'll be messaged the entire time. Muting it doesn't help because you might miss something "important". People can message you about stuff on your day off and expect replies ASAP. I once came out of a pliates class to 6 missed calls to discuss a PayPal return gone astray 9 weeks prior. I stupidly set work a special whatsapp sound at one job. If I hear that noise now, 3 years later, I hyperventilate and start to tremble. Oh and if you're a keyholder your details go to the alarm company. They don't care if you're the furthest away, if you answer you go in. At 3am.
You're under pressure with targets the whole time- everything is made to feel life or death, if you're holding store, you're in charge of everything that happens and you also have to set the example. I did more admin but you also still have to muck in with the physical and manage and lead things like floor flips. You also can't duck arsehole customers as you're "the manager". My perception of customers was waaaaaay worse after promotion because I was either busting queues/working tills when it was busy because I could do restricted stuff or wheeled out to deal with dickheads and bitches. Cleared up way more piss, vom, shit, spunk, needles, used tampons etc to prove we weren't "above it", too. Which was as it should be but it's hard.
Much prefer my set hours, mon - fri, questions out of hours once in a blue moon which I can actually answer, and I can go home and relax 99 times out of 100. My office closes and we all leave it at the door. With retail when you're open long hrs every day of the week and you're tied to the shop- you don't fully switch off. It's like letting someone else mind your toddler.