After The Big Three, Attack on Titan is arguably the only shonen action anime to rile the fandom up. Hajime Isayama's culmination of a catastrophe-stricken dystopia took the world by storm and became one of the most popular anime of the modern era. After almost 88 episodes distributed across four seasons and multiple parts, the Titan saga is coming to an end later in 2023. The reason why AoT is such a hit is not because it has an overpowered MC or over-the-top action – the beauty of this anime is its complicated yet well-crafted plot, political maneuvering, and realistic characters. The show keeps the audience on the edge of their seats because no character is safe in Attack on Titan.
Source:https://www.cbr.com/aot-final-season/