From my experience social knowledge gained at school doesn't map very well to the real world. In every environment I've been in (except for my first part time job) the social interaction was vastly different from what I experienced in school.
Yes, I remember in my first real job, even though it was a crappy job, I was ecstatic about the fact that, with very few exceptions people were basically polite. There was no outright bullying. Is this adult life? I thought. Great!