The first half of the season was rough, but I thought the last three episodes were fine. I thought the character arcs were handled well, especially Colin Ferrell's. That scene with his son was heartbreaking.
I think it just crossed the line where the Internet rips it apart, and you can't come back from that.
They certainly could've made some parts of the plot clearer. In some ways I like that they didn't hold people's hands, but maybe they should've. I never thought it would be as good as season 1, and it wasn't. But it was definitely noir all the way. I liked that aspect of it.