The Epicureans are among these; they deny that there is any Mind behind the universe at all. This view is contrary to all the facts of experience, their own existence included. For if all things had come into being in this automatic fashion, instead of being the outcome of Mind, though they existed, they would all be uniform and without distinction. (On the Incarnation De Incarnatione Verbi Dei. St. Athanasius)
God is willing, able and destined to vanquish evil completely at the end of the age. Why he doesn't goes to the purpose of his will, something beyond the natural mind.
It can and will be done but God has decided to let the wheat and the tares to grow up alongside one another until the end of the age.
Evil is actually willful sin.
How art thou fallen from heaven, O day-star, son of the morning! how art thou cut down to the ground, that laid low the nations! And you said in thy heart,
- I will ascend into heaven,
- I will exalt my throne above the stars of God; and
- I will sit upon the mount of congregation, in the uttermost parts of the north;
- I will ascend above the heights of the clouds;
- I will make myself like the Most High. (Isaiah 14:12-14)
The last one is telling, to be like the Most High. This is the essence of the temptation in the garden of Eden.
For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse (Romans 1:20)
As many times as I have encounter atheists and agnostics, not once have they asked me what God is like. There is a reason for that, they already know. God is self existing and self evident. God does not give an account of himself to us, we must give an account to him.