I just thought the end was a bit too "out there." It's kind of hard to explain, but it was just too much of a gap from what you "thought" was going on that it really just made you feel like getting caught up in the story was a waste of time, because it really wasn't about that at all. I couldn't even consider the end a plot twist (or numerous plot twists) because it practically ignored everything that happened leading up to it and took it in an entirely new direction. The first (and only) time I watched it I just thought "Where did that come from? What just happened? Is that the end?"
Perhaps I just missed the point, or got lost in the plot, but I found it to be way over my head, and I normally like when a plot makes me take a proverbial step back and say "woah!"