I think there is a lot merit to the idea of Free Will as simply the ability to make a choice without that choice being controlled by some external agent/entity/whatever.
We are not programmed. We are not controlled. We might be influenced by other people, events, results of previous decisions, genetics, brain disorders, good memories, bad memories -you get the point: every variable that leads to every choice we make.
But this doesn’t preclude some aspect of determinism. I do believe that you could predict every choice a human makes, with a high degree of accuracy, if only you knew all the variables that influence the making of that choice. But still no one (person, computer, hitherto unknown variable analyzer) could ever predict with 100% precision, for example, that I was going to type this sentence in exactly the way that I have. Or this: gralaca trebonit sedroglivan. I don’t care how many variables one has access to, that last bit is entirely unpredictable. I didn’t even know I was gonna do it until I spontaneously decided to and I have certainly never typed those sequences of meaningless letters before and probably no human (or monkey for that matter) ever has. I just don’t see any kind of way to predict with that kind of precision. And if you can’t ever theoretically predict what a person is going to do next, then there must be some degree of free will.
To bring this back around to the topic, we cannot predict and we will never be able to predict human behavior or every “evil” event with precision. If we could, we would be duty bound, according to the morals of most people, to try to stop “evil” events before they occur. A tornado is going to destroy homes and kill people? We’d go try and get those people out of there. Some rando is going to shoot up a school? We’d try to stop him before he got there. We may now be all-knowing, but we are not all-powerful: we may not be able to save everyone, but we would at least try. Or not; some may decide we shouldn’t waste the resources or tread on precious freedoms to prevent all the bad things (unless they are happening to ME!) and just let “nature take its course” because we are certainly not maximally or universally benevolent.
But God supposedly knows every bad thing that is going to happen, has the power to stop those bad things and is maximally benevolent and the source of all “good” -“evil” should not exist in this world if those three things are true about God.
Evil exists; therefore, there is no God as described in, at the very least, the Abrahmic religions.