My take: while an argument could be made that her vocals are a bit monotonous - that is her style - like it or not.
It's no secret that the quality of pop music including rock has dropped off since the 90's - at least she is doing something creative and different. Regardless of whether or not you in particular like it.
She is Kimya Dawson (born November 17, 1972) - an American singer-songwriter, best known as a solo performer and as one half of The Moldy Peaches. Her music was featured in "Juno".
And as performed by Ellen Page.....a bit more pleasant vocals....