I’ve seen that movie, it avoids Christian scripture rather than answer. The issue of why a good God would let bad things happen has been addressed many, many times. I think Chesterton and C.S. Lewis give the best written replies.
In your words, from what you've read, what is the answer?
Kosta50 and I have discussed this on many other threads, and haven't found any convincing justification for, say, 1 Samuel 15:3, where the children are ordered to be slaughtered. Almost all the time, the result is an Islam-style cop-out claiming "divine will" or something to that distortion.