Jake is like the nerd in a bad 1980's teen movie. He was accepted into the cool girls club and then kicked out after he outlived his usefulness/they realized what a thirsty creep he was. When some of his fellow nerds try to comfort him he spits on them because they aren't good enough anymore. The only attention and sympathy that matters if it's from the cool kids.
Anthony Michael Hall did that shit better, but without becoming a middle-aged bearded troon.