I relate completely, and unfortunately am pretty much where you are so I have no advice. Just wanted to say, it's not just you. And I also feel the only way I'll be safe from their poison is when they're dead (egg donor + my father's egg donor. They hate each other - very long story - and used me against the other while tormenting me in their own ways). It's been 20-ish years of NC, except for every few years or so when one or the other finds me and tries to reach out, which is why I feel their deaths will be my only chance of freedom.
For me, it is still fresh (or it refreshes?) because "normal" family dynamics are everywhere. Movies, TV shows, books, commercials, greeting cards, billboards, songs, SM, my husband's family...endless examples of what loving mothers/grandmothers do/look like. If I'm feeling a bit down and I happen to see one, there goes my brain, bringing up my past and holding it side-by-side to whatever (TV show, movie etc).
Example: "See that?" says my brain, "That child on that TV show threw up and the mom cleaned up the kid, got them some medicine/something to comfort them, and then cleaned up the vomit. That's never happened to you [me], has it? Let's remember the times you vomited, then told your mother, who then proceeded to scream at you for (1) waking her up, (2) making a mess, (3) not getting to the toilet fast enough, and (4) wasting food. Then she'd yell about how you're old enough to clean it yourself even though you were too little to reach the paper towels, scream that your crying was going to wake up the rest of the family while throwing the paper towels at you (which were expensive so you're wasting money), then stood over you yelling to just STFU and clean it up, clean yourself up, and go the F back to sleep, and don't you dare think you're staying home from school because you probably forced yourself to vomit to get out of school because you are a lazy, attention seeking little brat, and if you mention this to your father you will be severely punished. Good times, Eh?" Yeah, thanks brain lol
I got this book, "Daughters betrayed by their Mothers" by Holli Kenley recently, and have started reading but it's bringing up a lot of sh!t so I'm not too far into it yet, but the stories end with how each woman healed/made peace from the betrayals, so it might be helpful to you with the overcoming part (that's why I got it for me!).