Good and bad have two authors. God=good. Satan=bad.
Once again we don't have all knowledge. What we think will be better will not be any better because we don't have all the information or understanding of what is the best way to run a society. Look at human history. We have tried numerous methods of running societies and it simply doesn't work.
As far as why God decided to give us emotions that's his decision.
Like I said he has given us a way out through Jesus. Don't worry about the flood just get in the boat and you'll be fine. One day all the evil will be gone. In fact it is promised.