Research Complete: It's simple: Raised with too much Empathy.
My family raised me with mostly Empathy and zero Arrogance. I've Google researched my mental challenges since Netscape. If you experience Arrogance as little as I have in life, you will live my life. Kindness, humor and Mother Theresa-like behavior goes a long way. But, a true healthy mind is equally skilled in empathy and arrogance. The mistake my parents made was teaching self-worth, arrogance and BOUNDARIES.
But, research does indicate these challenges are increased with an alcoholic parent, so...
Pat on my back for surviving the meanest people on the planet on my own, and learning that I come first.