The Saga of Darren Shan

After watching The Vampire's Assistant, I went to gather the entire series of the books to read. Now, having read all the books, I am haunted by the last few scenes. I hope I can forget about the series after typing here.
Having lived for over sixteen years as a half-vampire, Darren Shan had witnessed deaths of many that he knew and did not know. At the fight with his ex best friend, Steve Leonard, he discovered that they were half brothers, sons of Desmond Tiny. To anger Tiny and to open up different possible futures, Darren killed and angered Steve so that he got killed too. Due to guilt, he ended up in the Lake of Souls. He was fished out into the future of hundreds of thousands years later. Dragons ruled and mankind were long gone. His long-ago friend Alan helped create the first dragon. Evanna, his half-sister, struck a deal and got Darren to go back as a Little Person for a short while. He helped reverse his own destiny, by scaring away young Darren Shan so that he never went to steal Madam Octa. Then he went to die on the rooftop, by himself.
By doing all that he did, he gave back Darren Shan his life and perhaps Steve's life as well. Having lived through all the pain and suffering at witnessing and participating in the deaths of many, he gave back young Darren Shan his innocence and his childhood.
It is a noble thing to do, so that Darren Shan will never know Larten Crepsley and all that that followed. He will also not know that he isnt Dermot Shan's son.
All's well end well. Yet I cant helped being haunted by these last few scenes since I read through the life of the noble Darren Shan as a half-vampire. He was about to become a full vampire, one worthy of being a Prince, then he threw his life away. He will never know Debbie Hemlock, Harkat Mulds, Vancha March, Seba Nile and Paris Skyle.
Sure, this is good for the young and innocent Darren Shan. Yet I feel sorry for the old Darren Shan because he died young and alone. Perhaps that is why I feel sad and scared.
Guess I should feel better after having typed it out. Best to read another series to wash this series away.
Goodbye Darren Shan, Larten Crepsley and all those in the series. Best of luck in refuting Desmond Tiny's tampering.