Many years ago, John Updike laid down, for himself, a few rules for reviewing books. The first of them was:
Try to understand what the author wished to do, and do not blame him for not achieving what he did not attempt.
French’s book is too sexual, and not textual enough.
So no, I don’t agree that French’s biography is “somewhat unbalanced”. It is just that Chandrahas’s expectations of the biography were different; and that is not French’s fault.