Hi Tom, welkom
Wish you the best with your travels.
Please keep in mind that there are actual treatments in the pipeline which are either placebo controlled or have shown great results in the trials. As a matter of fact, one treatment (Dr. Susan Shore) is finishing the final trial this month before market approval, after 15+ years of research. We are eagerly awaiting the results.
If you are at your wit's end (wanhopig), I'd suggest to contact the Brai3n clinic in Gent, Belgium. A very renowned tinnitus expert works there (Prof. Dirk de Ridder). They do video conferences, as well as experimental treatments and medication combinations.
As for the euthanasia part, i guess many of us relate and understand, but many here are also hanging on. Despite their terrible situations. Because we know that the first treatments are (relatively) around the corner.