Why does Aurora get so much hate?
I think she's easily the best of the three original princesses. People always complain about how she's asleep most of the movie (not her fault) and needs a man to save her (also not her fault). But on the other hand, she's easily more smart and intuitive than Snow (clearly realizing her aunts are up to something when they ask her to go pick berries - while taking food from a sinister-looking stranger after explicitly being told not to even open the door isn't kindhearted; it's just stupid. Snow could have said a polite, "No, thank you.")
Aurora also is shown to be obedient and helpful, sensitive (reflecting alone in the forest how she wants to fall in love), an animal-lover, good-natured, loving toward her aunts and very thankful of their birthday party for her, charmingly shy (she didn't put on some brazen flirtatious air with Phillip), but also down-to-earth enough not to play haughty and hard-to-get with him, inviting him over later. She also has more of a reason to fall in love with Phillip than I believe either of the other princesses had, thus making her seem at least a shred more levelheaded and realistic. They had a good time singing and dancing together and clearly had an immediate connection, having dreamed of each other before; he wasn't just some hot prince (AND she's the only one who didn't know the guy she'd just met was a prince, also absolving her of any kind of gold-digging or snobby, status-seeking allegations).
My main beef with Snow is her naivete masquerading as kindheartedness, and my main problem with Cinderella is her lack of self-respect masquerading as grace (and that her story sends the message that landing a rich husband will solve all your woes - Aurora and Snow didn't need a man's money like Cinderella did; they both would have been queen eventually anyway).