I agree with several here who recommend that you stop trying to convince her that you're right and she's wrong.
You need to take a different approach that doesn't involve "attacking" her beliefs and appearing to her to be a raving lunatic Apostate™. She sees a 5-hour "rant" from you while she is a captive audience in the car as a direct assault from The Devil™. She's terrified of what this means to your marriage. She thinks she's living in the face of severe Spiritual Endangerment™. She's wondering how she could have missed the signs that you were an Apostate™ before she married you, and how is she going to deal with this mess?
You need to sincerely apologize to her for scaring the crap out of her, and then you need to STOP doing it. Then you need to prove to her that you are the best husband she could ever ask for, that she didn't make a mistake in marrying you.
Does she like movies or concerts? Take her on dates again. Buy flowers. Appreciate her. Go on walks together.
I realize that it's a horrible situation to be in, thinking that your marriage is going to fall apart. I was in a similar position over 20 years ago when I realized TTATT and my husband didn't want to hear about it. I knew that cramming it down his throat was only going to make matters worse; the indoctrination process conditions JWs to go on Red Alert whenever even a hint of contradiction lands on their radar screen. The situation called for stealth and subterfuge. My husband was emotionally invested in the JWs. Like many JWs his understanding of doctrine was rote - he was merely parroting what he heard, but he couldn't explain how the WTS arrived at the teachings step-by-step. His heart was set on Reaching Out™ and earning Privileges™. He had been convinced that JWs had The Truth™ by means of love bombing and some family ties - and that was the tactic that I employed to convince him that they didn't have The Truth™.
I'd been struggling with postpartum depression for over a year, and frankly, the JWs in our Congregation™ couldn't have been more misinformed and hateful regarding mental illness if they tried. I asked for help to maintain my Hours™, only to have a Pioneer™ Sister™ tell me to "Get your own damn Bible Studies". Rumours circulated that "Sister™ Scully doesn't want to go in Service™ anymore". I was treated like a leper at Meetings™. My husband observed all of the meanness, and I cried all the way home from Meetings™ more often than not. The conflict for him had nothing to do with the teachings, but how could The Happiest People On Earth™ and the Only Loving Brotherhood™ treat his dear sick wife so badly? It was in direct conflict with Jesus' words: All will know that you are my disciples if you have love among yourselves. He saw that their bullying did nothing to improve my mental health, and that I needed to distance myself from them to protect myself. Eventually, his disappointment in how our family was being treated during my illness made him ready to explore TTATT. It was a long difficult process, and I honestly felt at times that it might take years (in reality it was about 6 months), but it was worth the wait.
Keep in mind that Armageddon™ is NOT Around The Corner™, and that you do have time. There needn't be a sense of dire urgency about extricating your wife from this belief system. You need to know what it is that keeps her attached to the JWs, and from there you can identify how to break down those attachments.
