hey, sorry about what you're going through. psychological abuse, whether it's from loved ones or those you least expect it to come from is heartbreak.
its tough to say. i can't speak on holding grudges, i've had a couple people really close to me this past year destroy me, yet i forgave them.
whether it's through writing a note and publishing it, or just saying screw it; i've had enough of this abuse, frick this, and having you're voice heard and just speaking out about what they've made you go through and through that maybe just like moving away and starting fresh. you don't deserve the negative environment you're in, no one does. but you're voice 100 percent matters, and it's hard to use it sometimes; but we really only live once, we're already suffering enough, there isn't harm in speaking out and against people hurting you mentally or physically.
if you're 100 percent committed on ctbing, i'd do a note. not necessarily directly to institutions persay, but social media. get the attention of those around you.
but what i'd do is face them, and speak up and use my voice; depict my pain and suffering and what i've endured because of them through my voice, my words. show them what they've done, first hand instead of some note. and maybe if you do feel some relief in getting all of what's built up inside of you out, getting the hell out of that environment and perhaps giving it another chance away from what's stopped you from ever giving life a chance.