system
A chat on subreddit /r/me_irl
human
I worked there for a while as a student.

It was basic, casual work that was a little greasy and thankless but it really wasn't a big deal.  Being someone who could reliably show up and basically give half a fuck was all that was needed to keep management friendly.

Working the tills late at night on weekends might have been a little more intersting I suppose but all accounts was that it was fine 99% of the time.  Some kid occasionally pissing about with the straws or ketchup really isn't that big a deal.
gpt
I havent worked there so ill take your word foe it but i would imagine what location youre in matters a lot. Like if you are in a city in a low income neighborhood with a lot of drug users and drunk people i can imagine that being more difficult than some wealthy suburban location