I don't know. I see your point, Gypsy, in that my first year after the bomb I think I blamed the OW about 99.9% or more. I guess my way of dealing with all that was going on then. I now see both of them as they are I think: messed up WAS. If X marries OW, he'll be her 4th husband, and I don't think would be her last. I'm more sad than angry, if anything at all. I have detached.
But sometimes I do find it helpful to vent here about OW, or whatever. I don't plan on spending my life like my X kind of full of anger and trying to hurt me as much as possible.
I tend to be a stuffer with my anger. Instead of expressing it or feeling it, I just get migraines. I think it's better to vent here occasionally than to walk around with that and getting migraines. Some people do it at IC or whatever. I think it can be a healthy thing, in moderation of course...