I do understand where the outrage and controversy surroundig this movie is coming from.
I think it is due to a simple misunderstanding: This is not a biopic. This is not about Marilyn Monroe but about the myth that is Norma Jeane Baker. From this point of view it does succeed, albeit with a lot of cruelty and fetishization, but that is what it is supposed to be and how it might have to be in order to truly portray accurately this piece of modern American mythology.
And when have we decided that cinema must not be cruel?