Hi Rain,
I recognised much in your OP. And I feel for you, desperately wanting Husband One to come back. That was me a few years ago. That's all I wanted. And he didn't come back. I spent many tearful months asking myself 'where oh where' was the old DH? And 'what have I done?' and, just like you, 'What can I do to make the old DH come back?'.
The answer is a depressing one: Nothing. I tried everything I could think of and there is nothing you can do. After all, you are not causing this.
In my case it became clear to me he was abusive. I ended up like a kicked dog, and nothing I did was ok. Nothing made him happy. We had two very young dcs. We are now divorced.
It became increasingly clear (as the pendulum swung so far that he was being Mr Nasty 90% of the time) that Husband One was never coming home, which was a source of total grief for me. I'm so sorry you are going through it too. Unfortunately I agree with most of the other posters - that Husband Two is your husband.
The blame thing is huge. You find it hard to come to terms with the idea that you are to blame for everything that goes wrong. All his comments to you suggest that he has no love or respect for you. They are all nasty, uncaring, self-justifying and mean. He is bullying you - either to shut up, to confuse you or to get you dancing on the tin-tacks that he has laid out for you.
I used to get this. 'You just disagree with me', 'You just want what you want' 'You're lazy and selfish','There wouldn't be an argument if you didn't disagree with me', 'You don't care about your children, all you care about is your friends and your next cup of coffee.' Hurtful, vicious, vile stuff. And he was never sorry. When challenged, he was always right - blame the victim all the way. 'You provoke me', 'You always make me angry'.
The most shocking thing is that he is so hard. His comments have no feeling for you, no affection. No sense that he is sad about how miserable you are. No, you are the problem. This is totally the wrong way round. If you are miserable, then he should be concerned, not bullying you for being miserable. Does he ever ask himself how he can make your life happier? 'What can I do to make Rain feel good?'
I don't want to project my stuff too far on to you, but it is hard not to because just the words he uses are so close to the kind of bullying bullshit my XH came out with to justify unjustifiable behaviour. But, my XH created a hostile environment for me and the children. It was horrible. I was desperate to have a warm and happy family life, but my home became a fearful, tense and vengeful place.
To cap it all, almost inexplicably, I was very ashamed that I had landed myself in this situation. I was ashamed to tell my family, ashamed to land myself on my friends. But in the end it couldn't be avoided as I was a miserable, crying, stammering wreck trying to pretend I wasn't. When I told people how awful things were, EVERYONE, was supportive and understanding. And EVERYONE wanted to support me to get him out of my life. NOBODY said, 'you should stay together for the children's sake' - quite the opposite. Even my mother said 'you have to get out of this'. She could see I was sinking fast.
It's not your fault Rain. You sound fab.