Being smart IS better than being dumb - clearly a smarter person has the ability to formulate more solutions to more abstract problems - but it's not SUFFICIENT. I think a lot of smart people fall into this trap. Being smart doesn't make you moral, empathetic, doesn't make you hard-working, patient, generous, driven, doesn't make you good looking, athletic - doesn't weigh in on any part of who you are other than that of your intellect. If you can't apply your intellect to understand the levers of society, and make concessions to them, then that is to your detriment, and is your problem. Perhaps it's your "I'm 170" attitude that is creating barriers for you?
You were called on the floor as being sociopathic, almost certainly for this: "fuck it, you know what, I don't care anymore. Enough of trying to do good for others, I'm doing this for *me* and the rest of the world can go fuck itself."
You rebut: "I'm in this life for ME now." It would appear that your self-description certainly fits the dictionary definition, if not the DSM-IV. If you're "sick of doing for others", then you never really were in it for doing for others, you were in it for, as you say, yourself.