omg why are you guys thinking so much into this! People hate Ayu cos they're jealous.
lol okay but in all seriousness... I think most haters think along the lines of "she doesn't deserve whatever she has achieved", and that's when it kinda links to being ignorant about her career or life.
Most people don't know stuff like she lost her hearing in her left ear, or that she used to want to quit being a singer, or that she injured herself and yet still insist on performing...
Imo, Ayu's... special. As in, it'd be pretty hard to make anyone a fan by getting them to listen to one Ayu song. Her voice is tbh annoying to most people (we like it cos we're fans, and there're even fans who dislike her voice), and her "look at me so kawaiiiiii" image is obviously stupid to the layman as well.
Like just looking at her in terms of a "singer" or whatever, it's gonna be hard to win people over. But I realized Ayu is the kinda celebrity who... you love more and more, as you know her more and more.
To the point where... you don't see her as a performer/singer/musician anymore. You see her as someone you have great respect and admiration to, for her personality, her strength, her everything.