This is answered in my thread Did God threaten to do evil? regarding Exodus 32:14. Excerpt:
So, a couple of things:
A) By using that word, it implies that God is doing something evil, which, as stated above, is contrary to God's character.
B) Not all translations of Job 42:11 use the word "evil." Some use "adversity" and "trials.".
C) Just because Job's family and friends attributed it to God doesn't mean they were correct. Even Eliphaz, Bildad, and Zophar were not right about everything. They falsely accused Job of sinning and bringing the sufferings on himself.
God allowed it for a time to test Job and prove Satan wrong. He even opened the invitation. But it was ultimately Satan who was the one doing it. If Satan had no relevence beyond Job 1:12, then there would have been no point to even mention him in the first place.
I believe Yahavah used, Rome as Satan to the Israelites. Aside from that the character of Satan is overall, is a Character who is desirous of abstracting light, and embracing darkness. From what I gather, Satan is no longer around anymore anyway. We have our own selves to deal with, be our flesh conflicting with our soul. That is my opinion. I get how "Satan" can be used for a person who is thinking of things that are not of Yahavah, an adversity against oneself. Etc, but it's over all an entity concerning the darkness, and all of its entailings.
If darkness resides outside the Kingdom gates of Heaven, then darkness continues to roam and effect the hearts of many. Which is in need of renewal in light.
"people loved the darkness more than the light."