For years, writers have been crafting conventional stories wherein the bad guys lose and the good guys win. It's not a terrible plot line, since everyone loves a happy ending, but that doesn't mean the heroes can't take few lumps on their way towards victory.
In some anime, the good guys don't just lose to the bad guys, they get beaten to to an unrecognizable pulp. Some of the smartest and most underrated anime villains manage to get the drop on their heroic adversaries and kick 'em to the curb. If you're someone who always roots for the protagonist, get ready to have your heart-strings tugged at mercilessly.