Bella as a hero?

Talking in class about this the other day, made me really think on whether or not Bella is considered a hero in my eyes. Of course, we all  know she saves everyone at the end by turning out to be a shield after her change, so yes, I suppose in the loosest sense, she is a hero. But I've always had a major issue with Bella's character to begin with. There were four books that took us through the story: Twilight, New Moon, Eclipse, and Breaking Dawn. Typically all four, in a sense, have Bella's mortal life in danger, with the exception of Breaking Dawn after she was turned, which put her life in danger as an immortal. Though I dislike her character nearly entirely as a whole, Breaking Dawn seems to be where the problems I have with her take a turn towards disdain. In Breaking Dawn, after the birth of Nessie, Bella  is, for lack of a better word, "perfect". She, unlike every other newborn we've heard of up until this point, is not bloodthirsty, she is in complete control of her actions in the hunt and every time else (to the point to where even Carlisle is baffled), and she turns out to be a shield (who can still block Edward if she so desires) at the perfect time where one just happens to be needed to save everyone's lives. I've heard some argue that she's earned this "easy" outcome base on every misfortune she's endured until book four. I simply think it's ridiculous. After those so called frequent misfortunes, it's disappointing to end a book with so much build up, with essentially nothing. Anyone else agree?