I am sorry to hear what you are going through. My wife is not atheist, she is United Methodist, but her vehemence against Orthodoxy was just as firm as you are describing. When I first told her I wanted to join the Church, she accused me of calling her a heretic, and I got a shoe thrown at my head. For over a year, there was open hostility to anything I said or did that was related to religion. I wondered if we were going to survive as couple, and she said a number of time that I seemed like a stranger that she didn't even know. Eventually, her wrath has cooled, and while she is not receptive, she has finally learned to accept that this is a part of who I am. I think for her, the big thing was that she felt betrayed. We had always gone to church together and generally been on the same page, and suddenly, I own icons and I'm saying weird prayers. Whether or not it makes sense is besides the point. I do very little fasting, and other than Divine Liturgy on Sunday mornings, I go to almost no services. I do what I can, and that is all God asks for. It isn't a sin to forgo some of the traditional Orthodox practices out of love for your wife. I sense great bitterness towards her in your posts. Please resist that temptation. She is a frail human, subject to all the same weaknesses that we all have. She probably feels hurt and is lashing out. This is an opportunity for you to learn patience. I have many people tell me that I should be pushing harder on my wife for her to accept Orthodoxy or to do this or that. I smile and politely nod, but they have no idea the dynamics of my marriage and what it takes to make it work. I know that God has called me to love her as Christ loves the Church. That means I need to give up some of the things that I would love to participate in for the sake of her soul. I'm not going to tell you to divorce her or not divorce her, but just remember, that you may be the one strand that brings her salvation, so be very careful before cutting that. Don't let bitterness or anger be the reason that this bond is severed.
May God bless you in your journey.