Yes I have, unfortunately more than once.
One job I was working for a large coffee chain, been there for about 4 years and the woman that was managing the store turned completely bonkers in a short space of time. Screaming at staff and customers, turning up late, leaving early then on our backs’s making sure we were there on the floor, 10 minutes before with no pay, taking drugs at work etc. I spoke with the area manager in confidence or so I thoughtand said it was getting out of hand. I came in to work the next day and she went absolutely mental at me and I was generally worried about what she was going to do. I left and never went back. I heard a year later she was fired and sleeping rough so wish I hadn’t just walked out but at the time it felt like the only option.
Another was for house of Fraser. I was interviewed and hired as an assistant manager. On my 4th shift, one girl asked the manager if I was the new assistant manager and he said, “no, not till she’s been here 6 months.” Was news to me. Then on my 5th shift I was told by text, I was doing a double shift (9am-9:30pm) opening and closing completely by myself, no means of taking a break and with no training at all and the next day would be the same. I got till lunch time that day and decided it wasn’t worth it. I told someone I was going to the toilet and never came back. I later found out he did it to all the members of staff and the turnover was incredibly high.
And last was for a global shipping company. My first day I was told “you need to do X Y Z, I’m going for a meeting” I was left completely by myself with absolutely no idea what was going on and then other team members were shouting at me as they couldn’t do their job until I’d done mine. It didn’t matter when I told them I hadn’t been trained at all. I decided to try again the next day and the same happened. Then lunch time came, the whole office went to the local pub to celebrate someone’s birthday but I wasn’t invited. They went to the pub and I left and didn’t go back.
Ive also worked with people that have just upped and left and I can completely understand why people do it