When you first see Doreen you're lead to believe that she's chubby, the tail extending her Sprite doesn't help either in that regard.
But then you look down and you see the typical slim waist and suddenly the face doesn't match the body.
Seriously, the face is by itself bad enough because it looks so different to literally every other face in the game, but then you look at the body and it retroactively makes the face look like it's been repeadeatly hit with an Iron to be flattened.
It's just flat out unappealing in every single way.