I've worked as an English teacher in Korea for a couple of places, by far the worst was a private kindergarten run by a narcissistic psychopath of a woman. Let's just put it this way - many private schools in Korea treat the students and parents as customers and the school as a business, and keeping up the appearance of doing a good job teaching these kids is more important than actually doing a good job. This woman pushed this concept to the absolute limit.

We would regularly put on horrible, tension filled "performances" to show off how much English the kids were learning. If anything went wrong during these performances, the boss would drag us all into the staff room and proceed to screech at us in Korean for what felt like absolute eons, then send the English staff out and continue to scream at the Korean staff for an even longer time. The one time that particularly stood out was when she subjected my Korean co-teacher (basically an assistant teacher who would handle any problems I couldn't because of the language barrier, and deal with behind the scenes work like parent phone calls etc) to a particularly lengthy screamfest that had the poor girl in tears.

I asked my co-teacher what she had done during to piss our boss off so much: At the end of the class/performance, she'd announced to the parents in attendance that if they went to the room to the left, they'd find some delicious food waiting for them. Our boss took offence to the phrase "delicious food" being used to describe a plate full of sandwiches, saying that her dishonesty was giving the parents a bad impression of the school and everyone in it.

I love the country, and I love teaching kids, but that one almost made me leave it all behind for good.