After the reveal of the killer, there's still a handful of of decent episodes left. I'd say as soon as they seemingly put a close on the Laura case, that's when things really turn to shit. You have put up with a lot of bullshit in season 2, but it's almost worth it for the last two episodes.
The James Hurley bit....omfg. You'd be better off just skipping through that. Excruciatingly boring. And the less said about the Civil War nonsense the better.