For those of you who've studied psychology, why do behavioral concern problems exist? (goal, get)

[avant-garde]

For many of us, it is very intuitive as to what we need to do to make a living, what our responsibilities are, and how to treat others with respect (as we would like to be treated).

But as I get older, I hear about so many saddening or discouraging things, that I've become inclined to believe that the "virtuous" living, for most people, is just a dream (or not even one of their goals). Why are so many people what we would consider "messed up"? (serious question)