Don't really understand the criticism here. Seemed like a solid episode to me. Lots of zombies offed (Hines Ward got his right at the beginning during the attack on Woodbury), and Rick is progressing down the road to a nervous breakdown. Not surprising, considering what's happened to him and how badly he's had to twist his moral compass in order to, not only keep himself alive, but the group as well. After losing Lori, he's super paranoid about losing anyone else. He knows how they're all looking to him to protect them and at some level he wants out. His mind is rebelling at the responsibility. Oh, and now he has a baby to protect as well. Good grief, I'd be freaking out too.
If you think about it, the differences between Rick and the Governor are shrinking. Both of them feel a responsibility to keep their people alive. The Governor has taken a more extreme path, of course, and he really is
deranged. Like somebody said, Rick just needs a little sleep and a little R&R. Like that's likely.