Why are people so ANGRY?

There are so many Angry Scared people.

I know you're like, how can someone be angry and scared at the same damn time?

Angry at the fact that they're scared to live out their dreams. Angry at the the fact that they're afraid of the very thing they really want to do. They can't live with themselves, or be by themselves because they're trapped in their own limitations of thought. 

See, to everyone else they want to be seen as one character, one that's high in Self Esteem, and never a flaw. These people I really can't stand, mainly because they're the ones who "Think" they know who you are as a person. They give speeches as if they're already successful, when in reality they're still struggling. They don't like when someone else points out a flaw that they'll never see, or refuse to see. 

This has me thinking, how could you ever be close to anyone in life, when you're acting like you know everything, and everyone? You're not God.. and that's why God made us the way that he did. Otherwise humans would take advantage of that all the time.. Mind reading..