No work of fiction is complete without a villain of some sort. After all, if there's no villain, who will create the conflict? Who will the heroes confront in the climax? Who will sing the best songs?
But sometimes, writers encounter a problem. See, sometimes... what the antagonist is doing? It's not illegal, or even immoral. At all. Like, in a sports story, the antagonist would just be the [...] [tvtropes.org]