Just pain in anywhere u can think of

Wondered why as we grow older, life becomes more complicated?
Aint it supposed to be that as we grow older, we become more mature and able to solve more things by ourselves?
Why is it that we become more dependant on others?
And why the hell we tend to think so complicated?
A simple matter we make it till so complicated and worst..
In the end, our minds da one who cause all the troubles...