Meh endings are a very common problem with the genre, not exclusive to AoT. It's very hard to find a good Shonen ending that managed to please everyone. : r/ShingekiNoKyojin

Print Page - The Official Anime Reviews Thread.

Attack on Titan Finale in a Nutshell. All that great built up for

The general ANIME thread [Archive] - Page 4 - Project Reality Forums

So, what y'all say about this? : r/ShingekiNoKyojin

Spoliers ch.139] The Translation Error

Anime Recommendations Thread - Dollars BBS

What are the animes similar to Attack on Titan and Death Note? - Quora

Shingeki no Kyojin - 04 - Lost in Anime

80 Anime Like Attack on Titan

What do you think Eren's true plan is (Attack on Titan Manga)? - Quora

Mahou Sensei Negima! – 3-A Forever (END) – Random Curiosity