Accepting responsibility isn't your problem. I think you readily accept responsibility for everything...whether you are guilty or not.
And that is the problem.
I think a lot of time you accept responsibility when you don't believe you did anything wrong.
I think you honestly believe the "real problem" in your marriage is your wife. And if your wife could do things your way or see why you are a good leader you both would have a happy marriage.
I don't think you trust her problem-solving skills. You don't like the way she handles relationships. You believe she has a short fuse and a critical spirit.
I don't think you see marriage as a team. A partnership.
You need to recognize this is not about you "being a better leader" for your family. It's about you both becoming a team. It's about realizing you both bring strengths to the marriage and you can draw from those strengths.
Stop trying to lead. You don't know what this means. Besides, she won't let you. She moved out and filed divorce papers.
Take a baby step and begin by being a non-judgmental and loving spouse.