What's a sign someone has been at a job too long?

I worked at a sainsburys warehouse for like a month before quitting, I was literally on break and decided to walk out because it just wasn't worth it for a multitude of reasons, mainly that it was so poorly managed. Anyways as I'm clocking out to make sure I get paid for the couple of hours I'd worked that day one of the floor managers sees me (one of the people responsible for it being such a shitty place to work by being shit at their job) and asks what I'm doing, I just told him I'm quitting and he sighs and says 'follow me' I dunno why I did, I should have just walked out lol but he takes me to another floor manager and tells him I'm quitting, I guess in an attempt to shame me? and the other floor manager tells me to go tell the agency staff, I just say 'yeh that's exactly what I was about to do' and walk off. I always remember that because there was literally no reason for that floor manager to care that I was quitting, there were literally 200 other people doing the same job, I was in no way leaving them short staffed, was he the owner of the business in disguise or something? I dunno but when I was at the agency hub a security guard was in there chatting up one of the agency girls and he told me he called that place the 'meat grinder' because it churns so many people out so I guess the floor manager was just annoyed to see another person quit, completely oblivious to the fact that he was one of the reasons for it.