Although somewhat historically inaccurate.
Pamela Morrison's parents own half of Jim Morrison's estate (the other half belonging to Morrison's parents). Pamela's parents would not approve licensing Morrison's recordings for the film if Pamela was portrayed as a manipulative heroin addict (which she was). So she was portrayed as squeaky clean by Meg Ryan.
And Patricia Kennealy claimed that Morrison took their pagan marriage seriously; that Stone's portrayal of Morrison as laughing off their marriage, doing it as a joke, was a lie by Stone.
Yeah, I have a lot of issues with that movie, myself.