Sometimes people peak in their teens. This is the last point in their life at which they actually had it good, felt free and optimistic. Often these people never actually grow out of being teenagers. They never get any better at life, and at age forty still have the coping skills that they did when they left high school.
Talking to them when they are adults is exactly like talking to them when they were kids. It is impossible to befriend such people. It is impossible to have a meaningful relationship with them.
The only way for some people to grow, is to suffer and to find a way out of that suffering. To experience a bad, bitter marriage, and an ugly divorce, to lose someone close, to see have multiple shifts in life and to emerge from them, to learn how to handle setbacks and despair.