I was in a similar position but my wife wasn't quite as brainlocked as yours...our kids were babies really and I was determined to push it so they would not be raised JW's. It was a decision point. My preferred outcome was get her out with me, or if not get out and stay out myself but stay together as a couple, and if that wasn't possible then accept that sometimes life moves on and this is not a dress rehearsal.
So I dropped in the 'Jesus is not our Mediator' question when she was a bit emotional about a difficult CA day to ensure maximum chance of success - that worked for me and she was mentally free within 48 hrs. Result. Thank you jwfacts.com. Let me caveat that by saying she knew I thought it was all BS for many years before - just I hadn't been free to share my apostaknowledge with her until that point. However I had done the dutiful meeting attendance under sufferance although was completely not doing any FS, answering up, volunteering etc
Doctrinal arguments won't cut it for most diehard JWs - too many deeply implanted thoughtstoppers - 'wait on jehovah, don't run ahead, new light, have you been looking on the Internet?'
You might try dropping the bomb and saying you suspect the entire religion might not be what it claims - asking her to bear with you whilst you do some research - choose an emotive topic to hang this conversation on - nobody likes dead babies (blood) or molested children
Your call but its clearly badly damaging your emotional and mental health in the status quo - sounnds long overdue to decide to do soemthing proactive....