I used to work customer service jobs, and I have many awful stories that I could tell. As someone with seriously debilitating anxiety, some people made those jobs truly unbearable. One story sticks out to me in particular, and was also the end of my customer service run:
I was working at a café/bakery/giftshop, and in fact was one of my favorite spots in town, so I was pretty excited initially. I thought it would be pretty chill, and surrounded by nice smells all day. Uh... except the main demographic for that place is old rich entitled white women. What a fucking nightmare
So this one chick orders a breakfast sandwich, which are all pre-assembled ij the morning and microwaved before serving. She asks me, "is the bacon fully cooked?" Yes, the bacon is cooked. "Well make sure the bacon is cooked, and extra crispy!" To which I explained that while being fully cooked, we could not necessarily alter the crispiness, or lack of, of said bacon. She was just like "okay yeah whatever."
So I give this bitch her sandwich and wish her a nice day and all that. She comes back inside 2 minutes later, stomps up to the counter, and throws a fucking tantrum. She literally started slamming the bacon onto the counter in front of me, "THIS BACON IS RAW AND DISGUSTING. YOU LIED TO ME. ETC" and like.. at that point I was freezing up badly so I just said "It is cooked, I don't know what to tell you." Lol
She left a bad and extremely dishonest/exaggerated review on yelp the next day and I got fired for it (the owner regularly checked yelp reviews)
Fuck customer service. People are so awful when you're in a position of servant and they have power over you.