What did you try? Did you go to a church? Did you read the Bible? Did you ask Christ into your life? Did you trust in what Jesus claimed? Did you examine the claims of Christ? Most people know the Ten Commandments and the things that "thou shalt not" do.
This is a flawed premise since it implies that we are in a position to say what is good and what is not good about God. We ourselves do not know what good is naturally, for we are not basically good. How then can we judge God?