After 10 years and changing the world of anime forever, Attack on Titan finally ended with the release of its last three episodes through Attack on Titan: The Final Chapters. While the feature-length finale's very release was an event of its own, it had a lot more than ratings riding on its back. Fans looked to Attack on Titan's last episodes to redeem the manga's controversial finale and, thankfully, they were not disappointed.
Source:https://www.cbr.com/aot-manga-finale-changes/