Is God willing to prevent evil, but not able?

Either God is imperfect, or he is malicious. Either he couldn’t foresee all things with his omniscience and/or couldn’t create things as he wished with his omnipotence, or he could, and created Satan with the intention and approval of Hell and those destined for it. Be it the former or the latter, both are in contradiction with God’s described characteristics which find their source oddly enough in the same doctrine which is the source of the stories which are in contradiction with God’s characteristics, but not only that, God’s characteristics are in contradiction with each other. God cannot be omnipotent and omniscient at the same time; he cannot know the future without knowing what he himself will do in that future, because his actions are present in the future. In other words, without knowing his future, God does not know the future, because his actions influence the future. Either God must know his own future, and not have the power to change it, thereby negating omnipotence as well as his own Free Will, or God must be able to change his own future, thereby negating omniscience.