Malbim: Man is inferior based on his life's beginning, and its end. He comes from a putrid drop of semen, he is fed from Dam Nidah, he leaves the womb from a repulsive place, where urine leaves. His end is after a short time. The bridge between these, i.e. his life, is satiated with anger. Evil occurrences outnumber the good, like he said above (Perek 3)!