Those type of actions reflect a person who suffers from a very, very low self-esteem. Dig deep to get to the root of your self-esteem issues. This is really hard work and where the focus should be squarely on: YOU.
Here are some suggested readings to get you started, Vertex.
The Self-Esteem Workbook, by Glenn R. Schiraldi Breaking the Chain of Low Self-Esteem, by Marilyn Sorenson The Self-Esteem Companion: Simple Exercises to Help You Challenge Your Inner Critic and Celebrate Your Personal Strengths by Matthew McKay, PhD.