Wow. this story did not go where I thought it would. I'm used to the therapist/patient tale that ends with the patient, if not cured, than on the road to better health. To say this doesn't go there, without giving too much away, is the secret of this book's success.
The only quibble I have with this story is the two timelines, although they aren't noticeable as separate at first. We do spend parts of the book in the past, so I suppose it is to be expected. I still don't like this particular trope. Other than that, oh, my goodness. I am satisfied with the story and the ending. I recommend it to you as a very good read.
As Theo repeats, so much of what we do, think and say is related to things from our childhood.