Ask Lemmygrad

You can't get rid of all shitty humans. Some people will just always lack empathy and be psychopaths. What you can do is not reward bad behavior which is what encourages more people to act horribly to one another. You will see a massive drop in overall crime and bad behavior as needs are met and bad behavior isn't rewarded or tolerated by society, but you will always have someone somewhere that will be an outlier.