10. Angel Beats! (2010)
Angel Beats! builds one of anime's most ambitious premises around a purgatory high school where dead teenagers wage war against an angel to avoid being erased from existence. The show juggles comedy, action, romance, and existential drama with genuine ambition, but spreads itself so thin across thirteen episodes that none of these elements get the development they deserve. Characters disappear from the story as quickly as they're introduced, major plot revelations feel rushed, and the emotional beats that should hit hardest land with almost no setup. What could have been a profound meditation on life and death becomes a beautiful mess that tries to do everything at once. | © Funimation