Quoting J&E:" I honestly never seen it that way before.... Maybe its not ALL me that is the problem after all, because ... [snip!] ... never wanted to do. He thinks its great to 'get away from the kids' as he tells everyone but it was more to get away from him. "
It doesn't sound like you're the problem at all. PPD is an illness, it's not something you can control. It sounds like he's an insensitive twerp, especially if he's making out like you've caused all the problems in your relationship. If you feel the need to get away from him, maybe you should make it more permanent? You really don't sound happy where you are OP. Although I'm just a nosy lurker and don't know the full story.