The Human Tendency to Operate in Binary Categories Good Versus Bad

I think there's something about just the ordinary human tendency to operate in binary categories good versus bad. That person is just a jerk rather than okay that person might do some jerky things but actually that's coming from a place of deep insecurity and feeling like a failure or feeling hurt by life. So again if I have a friend who I really feel like I need to get this person on the phone right now because only they can help me with whatever I'm struggling with and they're not responsive, I keep sort of painting them again and again and again  and again I'm like Hammer texting or calling and they don't pick up. It's very easy for that person just to become