User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-68.33.90.183-20161230015535/@comment-24489996-20161230060834

300th comment yay! :D

Anyways, there have been instances in various anime and manga where the villains have won. For example, Shaman King is a perfect example. Hao Asakura becomes Shaman King because the protagonists accepted that he was too powerful and there was no hope of defeating him by any other means. Technically, Code Geass is another one because Lelouch got what he wanted in the end and achieved world peace at the cost of his life. Then there's PMMM the movie, where Homura becomes the antagonist and transforms into Homulucifer, thus achieving her desires and conquering her opposition (albeit making everyone happy in the process).

So no, the antagonists don't always have to lose. There are series where the antagonists are the victors in the end and the protagonists are deemed powerless. Even in shounen, it's seen, but often outshine by the "good guys always win" concept, making it more child-friendly.