I'm thinking INTP or INFP, with a lean towards intp.
He doesn't sound S to me at all. There's no basis in reality. And he makes broad general statements like, "there's more things to worry about in this world."
I'm more thinking T because of the critical nature, and the need for argument. (A normal NT may enjoy a good discussion or debate, with this unhealthy and unintelligent one seemingly liking to just plain argue.)
He could be a darker INFP, though, seeing the world in good and bad and it seems that he just thinks the whole world is shit. He also seems very sensitive to me. Not often a quality of someone with T.
The description of this guy made me laugh!!!