One of the things that helps me in understanding emotional behaviour, especially behaviour that goes against my own values, is researching the biology and science at play. We are strongly influenced by the hormones and chemicals our body creates in response to certain stimuli; situations, feelings, fears, physical actions. Many of these responses are ancient, primal reactions to life/death situations, which rarely take place in the modern business world.
I enjoy the YouTube Channel ASAP Science. They have a fun and cheerful way of communicating heavy topics, and a cute visual style. In this article I've brought together three of their videos which are especially relevant to what I'm talking about today. Please have a watch, or save them to watch later.
I am not a medical professional, but I will listen to you if you need someone to talk with. Get in touch as you need.