In the many years since I've read the Harry Potter series, like most fans, I've thought a lot about the ending and my satisfaction with it. While I enjoyed seeing it play out on screen, I can't help but feel that there was a better ending J.K. Rowling could've written.
My main issue with their ending we got is that it's too cookie cutter. Good guy kills the bad guy, most of the characters we love survive. Everyone gets married, has kids, and lives happily ever after. The end.
That's all cool, but with a story as big as Potter, the ending could've been more than that. I understand that because it's a children's series at the end of the day, the good guys have to win. We can't have some crazy ending where Voldemort wins and then maybe there's a sequel series or something where the day is saved.
I do think that we could've gotten to Voldemort's loss in more epic fashion, though.
My main problem with Harry is that by the end, he literally can't be beaten. He can't die. So, where's the stakes? An obvious solution to this is to not write in all these protections for him. Let there be an actual chance he can die in that final battle against Voldemort.
Even further, I believe that Harry should die in the forest when he sacrifices himself. Voldemort and the Death Eaters then do the march to the castle, where Neville steps up and is the one to defeat him. This would be the perfect swerve and it fits the story so far up to that point. If Dumbledore, Sirius and other fan favorites could die, why not Harry. And if one orphan could defeat Voldemort, why not a different orphan?