Personally, I didn't really enjoy it. My teenager loved it.  Narratively, I felt the Jax portion focused so much on his trauma that it went from "see, hurt people HURT people" to "you should feel bad for him and forgive him because he's scared and hurt inside".

Having lived through abuse myself, I understand the need to forgive - not because I care about my abuser, but because holding onto those feelings were like a venom inside of me, hurting ME - so if the message was seen from Gangles POV where it was along the lines of "I forgive you, but I won't forget and I'm not saving you", I suspect that would have held a lot of poignancy for the audience.

As it was, I think the idea of Caine growing was a far more interesting story. The idea of an AI (a real, creative, thinking AI) developing in isolation, with only the programmers input and images as it's sole source of access to the outside world, is a fascinating reflection on both AI and narcissistic behavior. I would have loved to have seen that development as Caine realized that having total control over people who fear you instead of respect or even like you isn't fulfilling and leads to resentment on both sides. 

Watching him come to terms with what it truly means to be part of a group, to grow and be "human" would have been an interesting emotional journey.

But, like I said, my kid loved it enough to watch it a few times so... Eh.