here is the paraphrase by wengqing,enjoy! :)

No — Gat*****y turned out all right at the end; it is what preyed on Gat*****y, what foul dust floated in the wake of his dreams that temporarily closed out my interest in the abortive sorrows and short-winded elations of men.

No, Gat*****y was all right at the end. But what made Gat*****y a victim, and what broke his dreams, and what was left of his dreams, made me not interested in the brief/premature sorrows and short-lived joy and pride of men.