Probably most schemas out there in the wild are "wrong" or too complex. And we have to live with that sometimes, because cosmetical changes to database are more trouble than they are worth. ORMs do not help much in this regard, in fact they probably make the problem worst.
Sometimes a schema can even be correct and the ORM will have trouble with it, Hibernate has (or had, I don't follow nowadays) a problem with n-n relationship tables that have aditional information on them, which is a perfectly fine normalization thing to do.
In fact, I would go so far as to say that if my tool dictates my data modeling, than there's something wrong with my framework.
Sometimes a schema can even be correct and the ORM will have trouble with it, Hibernate has (or had, I don't follow nowadays) a problem with n-n relationship tables that have aditional information on them, which is a perfectly fine normalization thing to do.
In fact, I would go so far as to say that if my tool dictates my data modeling, than there's something wrong with my framework.