We believe God created this universe. The God we believe in is all-powerful, completely merciful and fully benign. In spite of this we find evil in this world. This question plagued my mind from my childhood.
The answer I found is there is actually no evil in this world. We see evil in this world because we are blinded by our ignorance which is known by Maya in Hinduism.
There is a shlok in Shrimad Bhagwad Gita – Asat ka to astitva hee nahi hai, aur sat ka a abhav nahi hai. So, there isn’t a sliver of untruth in this world. Untruth doesn’t exist, only truth exists.