I'm inclined to disagree. I feel that I'm of above average intelligence, but I love my life. Sure, a lot of things piss me off politically right now, but there are so many things ... music, movies, art, technology, hiking, and people to share these things with that there is no reason for me to be unhappy. I don't get piss-fuck drunk (I don't know if that's what happiness looks like to), but I do enjoy the company of people and really enjoy going out and doing stuff like hiking, lifting, going to the beach, bonfires, etc.
I think you've got it in your head that if you're not drinking, having sex with slutty girls and going out clubbing, life isn't fun. That's about as wrong a perspective as it gets.