On a strictly literary and technical level, Freed is actually a worse book than its predecessors. EL James’ prose remains about the same, her characters are no better developed, and Ana’s response to everything is to flush or think “Holy shit!”
Furthermore, the plot is shapeless. Fifty Shades of Grey had the will-she-won’t-she-sign-the-contract plotline to create tension and give events some structure, though the contract was later abandoned. Darker was about whether they would stay together. Freed opens with Ana and Christian already married, and from there the plot was fight-makeup-fight-makeup, interrupted by one artificial crisis after another, usually resolved in the next chapter, or completely irrelevant events like the entire cast going to Aspen for no good reason. Then it’s back to scenes from a really bad marriage, as Ana feebly struggles against Christian’s controlling regime.
There’s no character arc either either. Despite all the sex, stalkings, car chases and kidnap and ransom schemes, Christian’s attitude towards Ana is basically unchanged by the end of the story. From one of their earliest meetings, the moment when Christian saves Ana from being hit by a bicycle, it’s clear that Christian sees it as his responsibility to look after Ana, with the implicit assumption that she can’t take care of her self. That continues right through to the end, when Ana, near comatose, hears her husband and her step-father both talking about her as if she was a little girl in need of a spanking. Ana, for her part, is so immature that it’s apropos. So, one-percenter Bluebeard meets dim-witted girl-woman and they live happily ever after.