Cirque du freak?

So i read the original book series of this 2 years ago and got to number 10 then stopped and didnt finish the last two, Forgot about it. i recently read the manga version the whole series. I am REALLY impressed with this series it is quite amazing i reccomend it to all. Right now, Because of the story im depressed because of the ending its so bad. The whole book series was good the ending is OK but i hate the ending because it leaves SO MUCH OPEN WHYYYYY!!!!! ALLERT THIS WILL TELL YOU THE ENDING DO NOT READ FARTHER IF YOU HAVE NOT READ: The ending they stop the main character by going back in time and preventing him from turning so all that stuff never happens which makes me sad.