I might sound like a hater but everything about this anime was subpar, the writing, the plot itself is pretty contrived and the motivations are pretty far fetched and at times stupid.
The characters themselves are very boring, and lame, and it's hard to find yourself caring about them whatsoever. It's just a very weak series, and for those of you who don't wish to read a heavily spoiler don't read any further, but it's a very annoying and I am going to complain about in 3... 2... 1...
The ending is basically like a cop out that makes everything leading up to not matter at all, which isn't saying much as you don't care about these characters anyways but man. Bad writing.