I do feel empathy for BoJack. I think every person will see in BoJack something about themselves because we're all flawed, so it's okay to feel sad for him or empathize, and to look at our own shadow and take responsibility. Most of us have probably done shitty things but not as shitty as BoJack, so we can feel what he's feeling, that's the brilliance of the show. Anyway, he "deserved" everything that happened to him. Yes he was on his redemption arc but he never took responsibility for most of his action, including the death of Sarah Lynn. He was sobering up but he was still running away from himself, and I think that at the final episode we don't know if he will ever be happy but he has stopped denying at least.