So why'd he get kicked out, anyway?
A million reasons, Holden replies—mostly, everyone there was mean and phony. He can tell Phoebe is listening, even though she refuses to turn around and face him.
Even the teachers were phony, like the way Mr. Spencer would kill himself making jokes when the headmaster was sitting in on his class, or the alumni that would come back on Veteran's Day to see if the initials they carved into the bathroom wall were still there.
He just didn't like it.
Phoebe counters that Holden never likes anything, which (1) is true, and (2)