Huh? She sound really nice there actually. Her review on Mirrorcle World sounds sincere, and I see no bashing there. even to someone who says she only likes 3-4 songs of ayu, she's actually being quite "nice" on her opinions there. It's not like she's resorting to calling ayu crap or directly bashing her.
Honestly, I've seem much WORSE than that, and I mean, much much worse, because I domn't even consider what she said to be bad at all.