Depressed throughout the novel, he takes jabs at the injustices around him, calling many people and things "phony," and while usually true, stating this only made him more depressed.
People he liked included his dead brother Allie, his kid sister Phoebe, and Mr. Antolini, a teacher at a former school of his who cleaned up the dead body of Kevin Castle after he killed himself by jumping from a dorm window.
"Goddam money. It always ends up making you blue as hell."
"High school's full of phonies, and all you do is study so that you can learn enough to be smart enough to be able to buy a goddam Cadillac some day, and you have to keep making believe you give a damn if the football team loses, and all you do is talk about girls and liquor and sex all day, and everybody sticks together in these dirty little goddam cliques."
"Sex is something I just don't understand. I swear to God I don't."
Yes, even more so than Sirius Black.
Holden refers to everybody as a phoney, hates his private school friends, hates himself and hates just about everything else.
"If Holden Caulfield were alive today, there is a 98.9% chance that he would be emo...and sexy"
"Oh yeah, that book with that piss-poor example of a teenager Holden Caulfield?"
"Yeah thats the one."