I'm sorry to hear you're in such a bad place. Unfortunately, this is a common theme for people suffering from this terrible affliction. I see you also have CFS and the hopelessness and depression is crushing you. I know somewhat how you feel and its certainly more heartbreaking that you are willing to leave your family behind because the pain is unmanageable.
I would like to give you some hope and a few suggestions.
Firstly, there may be some treatments coming in the near future (2-3 years). We don't know how effective they are and if they'll treat every type of tinnitus, but there is strong evidence that some treatment will come to market soon.
Secondly, there is a massive influx of funding for ME/CFS due to Long COVID-19. On top of that, some of the greatest minds in medical research are working on treatment for CFS. Ron Davis has narrowed down some treatments that do work and help many CFS sufferers (Abilify, etc.). They are now working on the Metabolic Trap Theory and testing every possible medication and herb to see if it can help with the metabolic trap and faulty IDO1 receptor. I believe that we have never been closer to a cure.
I don't always want to go back to this, because I don't believe its a cure all or miracle drug, but have you tried LDN? There are many success stories of people with CFS, POTS and even tinnitus. Also, please have a look at this article I found:
Successful treatment of postural orthostatic tachycardia and mast cell activation syndromes using naltrexone, immunoglobulin and antibiotic treatment
The article specifically mentions resolution of tinnitus for patient (along with remission of the rest of their symptoms). I will likely start a separate thread to discuss the article because I find it amazing that even the patient's tinnitus was cured (understandably the tinnitus was caused by these other conditions).
Lastly, these diseases (tinnitus and CFS) are mentally straining and seem to either cause more harm to or target people with mental instability. Many people with CFS and/or tinnitus are depressed and anxious and that is understandable; so many times I read posts that someone is depressed
because of these issues and I'm sure its true a lot of the time, but I would guess that for many people, if their symptoms resolved, we would still see an underlying mental health issue. Have you considered Ketamine therapy? I mention this because it is used to treat suicidal ideology and ironically seems to have a positive effect on tinnitus. If you woke up tomorrow, still had CFS and tinnitus and yet felt pretty great all round and could cope with your issues, do you still think that you would consider ending it in September?
I feel like for many people, we don't need to cure the ringing, we just need to help them get past the ringing mentally. I understand this is all easier said than done but please consider all avenues first, especially for your family. I think some of the treatments I have posted might help you greatly.