Why?

Why do people want to hurt each other? Seriously tho? WHY? So many of my friends have failing marriages, and their husbands (soon to be ex) husbands do so much to hurt them, to make them feel inadequate, to put them down and hold them there until they can no longer breathe. it hurts down deep in my soul. Marriage is a partnership you surrender to, you vow to get through everything Together. Mistakes happen, they are learning experiences, but to try to make someone feel like they are nothing? Kudos to you men. you know who you are, you REALLY are OUTSTANDING