Ugh! I'm so sorry you are dealing with this. It sounds like Post Ablation Syndrome (PAS) or Post Ablation Tubal Sterilization Syndrome (PATSS). Your chronic pelvic pain is more than likely caused by blood getting trapped behind the scarred / ablated lining or trapped because your cervix is scarred shut (by the ablation). Here are a couple of articles on this:
While hysterectomy should end the pain, it has a whole other set of negative effects especially in the long-term. Do you think you may be near menopause? If so, maybe you can wait it out? If not, I wonder if continuous birth control pills (taking the active pills continuously so you don't have a "period") would stop the pain. I do recall some women posting somewhere that a "cocktail" of supplements helped. I don't recall the ones they used but it seems that vitamins A, D, (maybe E) and magnesium were included but it seems there may have been others.
I hope you can find something to help without resorting to a hysterectomy and its ensuing harms. Here are some articles on hysterectomy - https://www.hormonesmatter.com/?s=hysterectomy.