My post is between the original poster and me, and I expect she has heard what I posted before. The answers to your questions would require substantial time and explanation. I will try a brief response.
The poster begins by calling her husband a “know it all,” explains the marriage has problems, and enumerates a litany going back years of her husband’s faults, which appear to include several instances of the poster seeming to passively accept her husband’s will but obviously still feeling resentful about it years later, sprinkled with the classic thought patterns of someone who fails at intimate relationships, e.g., we are complete opposites, he doesn’t see his problems, this is how he feels, he’s controlling, etc. The poster purports to ask for guidance, but when the responses trend toward her making an internal change, the poster escalates the problem to physical abuse. She concedes abuse never happened, but spins that it never happened due to her own initiative. This leads understandably to sympathy and calls for her to separate or end the marriage. The poster gratefully receives validation that he is the problem.
The marriage obviously doesn’t nurture either spouse in an emotionally and spiritually healthy way, but a healthy person won’t marry and stay with an unhealthy one. So we can urge separation. Yet what use separation for someone unhealthy enough to make the choice of an unhealthy spouse to start, then harbor years of resentment, cultivating thought patterns that lead inevitably to separation or divorce? I think that person needs to work on themselves first. And for that, they need to move their focus from the spouse to themselves.
To me kindness does not mean we encourage the poster to separate. Kindness means we hold up a mirror and reflect what we see with compassion. The most compassionate and kind thing the poster can do for herself is go get counseling. That is my guidance.