It's hard to understand why DenYuuDen has lost its way when it was going so well. Some said it was because the low audience, some say it's just bad script writing, maybe a mix of both. The fact is, Densetsu no Yuusha no Densetu is a good and enjoyable show, which unexplainably went the wrong way on the last 4 or 5 episodes. The only way to redeem itself would be by having a second season, but this seems highly unlikely from what I read.
I was really surprised by the story on this series. I was expecting just another action anime full of cliches, but I was proven wrong and in a very pleasant way. The constant dark tone this series presents allied with political conflicts and personal conflicts were what made this a very good series, despite the bad ending.
The animation, characters design and the sceneries were well done. It wasn't anything original but they enhanced to the right amount the feeling that was supposed to be conveyed at a specific moment. The action scenes were very short but were good as well.
The soundtrack ranged from very good to very bad sometimes. More than once the music felt completely out of place to a certain scene, which made me feel quite confused if that was actually the intention or just the sound director going nuts.
The character development was another strong point in this series, they were convincing, deeply explored and had their reasons to act as they acted. The only bad point was the development in the end which was very confusing and this is specifically what made this series lose so many points with me.
Overall it was still a very enjoyable series, despite the terrible ending. Even though I wouldn't say not to watch just because the last episodes. I say, watch it, and pray for a second season!XP