Yeah I would say MB is easily the worst of the 'Tommy era' albums (Mariah Carey, Emotions, MB, Daydream). Although Daydream is slightly overrated because it does have its fair share of schlock ballads that are no better than the blander MB ballads (Open Arms, WISY, Forever). Those ballads really bring DD down imo. If she hadn't felt forced to keep churning out that kind of ballad at the time, DD would've been a true masterpiece like Butterfly (as evidenced by a brilliant track like Slipping Away being pushed to the side). I feel like DD has an urban cool to it that wasn't fully realized.
In terms of her whole career I would rank MB towards the bottom along with Rainbow and E=MC2.