It seems to me that what Dan is going through is a normal stage. Not everyone goes through it perhaps (or isn't as vocal or sharing as he is), but Aussie Oz posted that he went through it. Hated himself, believed all the garbage his wife told him about how evil he was. We all respect him, but he went through this too. SD-7 is also going through it, and shared almost as much as Dan. Some people got fed up with hearing it from him, but many love and feel for him.
I just wanted to point out that when enough people have reported going through and feeling the same thing, then perhaps we should keep in mind that there is something valid about these feelings. Yes, Dan needs to pull himself together for the sake of his children, and himself. He needs to get therapy (even if only a few sessions as someone suggested) if he can't do it on his own, and it seems he can't. But he also needs to know that he is not alone in feeling this way, in being blamed for everything, and that others have gone through this same thing, in the same stages.
Tammy