I love your analogy with the map @Pickle48, it explains so perfectly how life feels sometimes.
Bear in mind that this is a feeling, an interpretation. Life actually does just go down one road, however much we concern ourselves with junctions and turnings. None of us will ever know what life would have been like if we'd made a different turn each time we needed to make a decision.
What you see as dead ends and wasted time, I see as different towns along the road. Yes, some of them aren't very nice, and yes, eventually we come to the 'thank you for visiting Craptown' sign, and that section of our life is over, but inevitably, we will have learned something in Craptown, and it will come in useful when we get to Nice-ville, down the road.
My abuser taught me the very best lessons I've ever had. I learned that I needed boundaries to protect myself from a horribleness in people I didn't even know existed, and especially not with such a pretty face. I learned that my voice and my feelings were just as important as everybody else's, regardless of how much they try to shush me. I learned that I am not a victim by nature, and that when I'm disrespected, I say 'Fuck you!', and that doesn't make me a bad person, so I don't have to shush myself.
When I left the relationship, my boundaries were so high, I struggled even to trust my best friend. Since then, a bit like a startled deer, I've gradually lowered them when I'm around peaceful, drama free people. Those are 'my people', but I didn't know it before. And that's what I seek out nowadays. People who make me feel peaceful and drama free. I have so much to thank my abuser for, including friendships I have pursued that I would not have done before, that make me feel safe, and will likely last my lifetime.
Your posts are hard to read, OP, because this relationship is causing you to feel such drama. So many unanswered questions, so much unexplained. You can walk away without answers to any of it. Nothing needs to be resolved. It doesn't mean you've hit a dead end, wasted time, or turned back. Walking away would mean that you've learned the lessons that this woman came to teach you: You can say no, and you deserve to. If someone treats you in a way that makes you feel bad, you can flip them the bird, and you don't even have to explain why, let alone justify yourself. You owe the world nothing, and you don't have to be a nice person, or be around other not nice people. There are no 'emotion laws'. Nobody has to be right or wrong in the way they treat each other emotionally. There are no 'powers that be' that can tell you if somebody is treating you well or badly. The only judgment to be made is 'How do you feel when you're around them?' Only you can make that judgment. This is about you, not her.
I use my feelings as a proximity measurer. If I find myself feeling bad around somebody, questioning their behaviour, questioning my own feelings, acting in a way that I don't like etc, then I stay far away from them. If I feel myself to be a lovely person around somebody, calm and relaxed, I take steps to get closer to them and spend more time together.
You sound ready to leave Craptown, OP. But you don't have to turn back, and you haven't wasted any time. You can walk out the far side, and continue on your own road without her. Leaving my abuser felt like stepping into adulthood, for me (I was in my late 30s) I'm so glad that experience is now behind me, but I'm so glad I went through it. Since a couple of years after I left, all I would have to say to my abuser if we met would be 'thank you'. I will ensure, however, that we never meet.
Coming out the other side and having some peaceful time on the road alone can infinitely improve your life, @Pickle48. If nothing else, you'll get some peace and quiet from the constant questioning that's triggered by her day to day actions. It's a massive waste of your time. You clearly think deeply and are a lovely person; you're a fantastic partner for somebody who will appreciate those things. But first be a fantastic partner to yourself. Offer yourself the dedication and stability that you are currently wasting energy on trying to provide for her. She doesn't want that from you; she only wants the parts of you that lack, or to pretend that you lack when you don't. She is creating and responding to a negative fantasy of what you are. That's her failing, OP. Not yours.