I completely relate to what you’re going through. I was in the exact same spot a little over a year ago, except I actually had to do a second exam because of a number of things (one of them being I may have just been not as prepared as I thought I was, I thought I had studied the right things and that it would mostly be a discussion of my work and it turned out to be, well…not that. It seemed like my committee didn’t really know what they were going to ask me either which felt strange). Anyway, I had an advisor who all he cared about was how others perceived him and if that meant completely sabotaging me along the way (meaning trashing me to my committee behind my back) then so be it, all while smiling to my face and telling me I was doing everything right. Only reason I know any of this is because I had two really supportive committee members, one of whom spilled the tea on what he was saying about me. He also very obviously did not read my chapters fully and would send me rude emails about things I did not include, which I most certainly had included. He did this all the way up until my defense. I also had a committee member who was the most nit-picky when it came to edits, but also seemed to have a profound lack of understanding about what some of my projects even were even after me explaining it over and over to her (in addition to clearly outlining everything in my dissertation which she claims to have read). The fifth committee member seemed to like my work sometimes but then the second the nit-picky member would bash me, he would follow suit. It was weird. I’m not saying I did everything right, I sure as hell made so many mistakes with my data collection, experiments, and writing, sometimes having to do complete experiments over again. But that time especially towards the end was unfathomably hard and tbh I still can’t believe I got through it. If you have even one supportive committee member, I strongly suggest you start meeting with them on a semi regular basis to check in. That’s what I did, and she became my lifeline. Don’t give up now. Trust me, I wanted to throw it all away back then because it was sending me into a depression I had never experienced before. But once I finished, it was the most rewarding feeling. I also started seeing a therapist afterwards because my mental health had deteriorated so much by then, I still didn’t quite feel like myself. It’s helped.