why???

why did God create an anger?
wouldn't world will be just much more comfortable without it?
why do human should have that kind of suck felling?
wouldn't life will be just much better without it?
why did He make sadness?
wouldn't my life will be just much happier than now?
why do people should have that damn felling?
wouldn't your life will be much more beautiful without it?
silly questions...but they're big questions for me...