Why is this anime bad? Well, let's see...
The story is poor.
-> A lot of support characters were popping out of nowhere. The writer was trying to make them appear important / look like some big shots, but we viewers hardly cared about them. The reason is they don't even have a proper introduction or background story.
-> How about the battle / war? There are waaay too many scenes of generic nameless characters whom nobody cared about, duked at it each other with no end in sight. While all of that happened, an old hag sat down on her chair calmly, sipping her tea and going "Hmmmm..."
The art is fair. The main characters are drawn properly, standard anime style, big eyes, small nose and chin, but those nameless characters are drawn sloppily / lazily. They could have been made faceless, and it won't make a difference.
The sound is very good. The BGMs are done by Ootani Kou, they are good and fit the mood just like season 1 and 2. Kawada Mami and Kotoko are good singers as always. While Altima handles both of the ending songs. They are EPIC. Which Altima's song isn't?
The characters are poor.
-> The motivations of the so called 'good guys' are ridiculous. They are mostly because of butthurt / unable to forgive the past. Also at least one of them was just a battle crazed freak. Also one of them was a hundreds years old obaa-san who's still trying to act cute at her age. Also one of them was a old hag in nun outfit and granny pants.
-> The heroine and the antagonist is even more poor. The heroine's motivation is really unclear. Is it a sense of duty? Is it some blind love? Is she simply going with the flow? Bah. Also the antagonist is one of the most awful character I have ever seen. He is supposed to be a good guy, actually, but his actions are totally opposite of that, and caused misunderstanding up until last episode.
How about enjoyment? Poor. I almost fall asleep because there are too many useless scenes and talks.
