Attack on Titan's series finale isn't supposed to feel good - Polygon

AoT’s ending episode helps explain the anime’s approach to Eren and his misguided dreams. And his failure is supposed to hurt for viewers who believed in him.

Attack on Titan manga ending couldn't escape creator controversy - Polygon

Attack on Titan' Is Ending but When Will 'One Piece'?, one piece project no filler

Attack on Titan Officially Breeds Fascism! I Mean That's What Polygon Says So It Must Be True, Right? » OmniGeekEmpire

The Grand Finale: Attack on Titan Season 4 - Final Episodes Explained and Key Characters

Attack on Titan is definitely one of the shows of all time! For 10 years at least! : r/goodanimemes

Attack on Titan finale review: Why the ending remains true to the story, shingeki no kyojin final season part 3

Attack on Titan's series finale isn't supposed to feel good - Polygon

How 'Attack on Titan' became one of the biggest anime of all time : r/television

A Show That Pits Japan Against the World Brings a Dark Past to Life - New Lines Magazine

So, Attack Titan/Shingeki no Kyojin ending might have been spoiled by Linked Horizon (Potential Massive Manga Spoilers) Spoiler, Page 3