Lady Lee said: "they will tell the wife to be in submission and wait on Jehovah"
This is true. It's the pat answer for everything.
The elders wouldn't believe me that my ex had schizophrenia (that he had neglected to disclose to anyone in spite of the fact that the doctors and hospitals had CARTLOADS of case files on him) and that it was a relevant factor in our situation. I was expected to bow at his feet swiftly and meekly on EVERY matter REGARDLESS. The flaws of the male are irrelevant in their minds to what the response of the woman should always be. I was told that if I was more submissive everything would be better.
They're a bunch of crazymakers on the stuff that does matter in life, and a bunch of micromanagers on the stuff that doesn't. Oh well. As far as I'm concerned, it was all for the best. Had they been reasonable, I might have stayed! (Perish the thought.)
I finally ended up outgrowing the whole lot of them, making decisions for myself, and seeing them as a meaningless and worthless entity. :) And now that I'm out in ze big bad world, standing on my own two feet (okay, sometimes crawling on all fours haha), I'm better and better all the time at ACTING on my bullshit detector instead of being so self-destructively trusting and submissive.
By the way, if any JW ever challenged me on leaving my spouse, I would say: Hey, Jehovah let it happen, it must have been His will. :)
Oh, and when I was a dub and JW's challenged my sister's exit, I simply said: Only Jehovah is the reader of hearts.
For what it's worth, there's some sort of poetic justice in leaving your enemies to deal with the problem you've been handling alone and criticized for for years on end. They usually don't last nearly as long as you have. Nor do they usually try anywhere near the amount of solutions you already have. (Ie. If/when your mom leaves, your step-dad will surely become a pain in the elder's ass or someone else's ass. He can only hide who he really is for so long under that kind of duress.)
When my ex and I split, he went home to live with mommy. Mommy et al treated me like the sole and exclusive cause of any and all problems and like I wasn't worth the skin I was born in. Six months later, however, my ex was out on his ass. :O) I only laughed internally, but I gotta say, vindication feels GREAT. :)
In the meantime, stay safe.