Over a year passed between the final and penultimate episode, so it makes sense that the characters would be ok with him despite being angry at him in the episodes before. And 14 months in prison isn't insignificant - sure, its unusually short for the US's fucked up justice system, but its still a lot of time.
And he totally does get punishment, even besides the prison time, he loses his relationship with Hollyhock and Diane, he loses his house, and I can't imagine going through the penultimate episode was a particularly pleasant experience. The finale doesn't punish BoJack because he's already been punished, the finale's job is to dwell on that and explore what that means for BoJack (and the other 4 characters) afterwards.
Over a year passed between the final and penultimate episode, so it makes sense that the characters would be ok with him despite being angry at him in the episodes before. And 14 months in prison isn't insignificant - sure, its unusually short for the US's fucked up justice system, but its still a lot of time.
And he totally does get punishment, even besides the prison time, he loses his relationship with Hollyhock and Diane, he loses his house, and I can't imagine going through the penultimate episode was a particularly pleasant experience. The finale doesn't punish BoJack because he's already been punished, the finale's job is to dwell on that and explore what that means for BoJack (and the other 4 characters) afterwards.