Crappy Lessons!
Yes, that's a lesson too. Sometimes the "bad guys," win. You see folks who really go out of their way to harm others, who can justify any inequity, who never admit they are at fault; you see those folks cruise along, happy as pigs in shit, with all the perks of a successful life. It's doesn't seem right. But it's part of the world, part of the fabric of our lives. We have to learn to live with that kind of thing too. It's another one of those crappy lessons included with all the others lessons we learn, whether we want to or not.