Why does Jason blame the existentialists for his problems...

Why does Jason blame the existentialists for his problems?

Beaming in his eyes is the lush shining brightness of her astonishing blonde hair warmly blending with her radiant light pinkness; her perfectly womanly shape being revealed in a manner more evocative for its subtlety than for any pretentious flamboyance, in her simple light blue dress, somewhat loose so that it is flowing with her motion; or, were it present, with a breeze, but far from billowing; with its two parallel rows of sewed blue