Can you be yourself in this relationship? If you can't, you need to express that and see how it goes. If she can't accept you for who you are and you're stuck walking on eggshells among a JW maybe it's time to leave. A friend of mine came to me talking about something similar. He tried so hard but the cult dominated his marriage still, and he left after 20 years or so. It was hard to tell his kids. But the sense of relief and freedom was immeasurable and he came back later lamenting why he took so long to do it.
Only you can decide where you are. Not us. I think holding you to percentages is silly. If the 15% of the time it was miserable she was hitting you we'd all tell you to leave. So percentages don't matter. What are you putting up with? What is she putting up with? What happens if you're authentically you? You say that you don't think she cares if the marriage falls apart. Why do you say that? Be you. Let her be her. If that isn't tenable, and often it is the JW that can't abide by the ex-JW being themselves, then you have to decide if that is worth enduring more of for whatever payoff you see.