You ask for a perfect world but do you know what perfection is? What if all of this is PERFECTION - the balance of good and evil.

Do you feel the world will be sweet if it wasn't bitter? I doubt

The World is sweet because it's bitter and life is worth living because it isn't.

The positives exists because there's negative.

If everything was positive then it wouldn't be positive. Things are only positive because negatives exist.

So my friend, enjoy the pain this world brings on you and smile at it. Be happy in struggle because in the end, that is the essence of our lives.