@Vassili
I'm so sorry you are feeling down.
I don't want to sound like a Pollyanna, it's just that sometimes when we are down, we see everything negatively and don't see the positive (even if it's minuscule sometimes).
You have come a long way, and there is still time for more improvement.
Even if you (or I, or anyone else) never fully recover to pre tinnitus & hyperacusis; there are many people with this who still go on and live a life.
There are also the possible treatments coming down the pipeline to hopefully help us all.
I find having a good cry lets out some of the grief, then one can carry on.
Talking to a psychiatrist is a good idea.
Some books that may be helpful???
"Tinnitus Toolbox Hyperacusis Handbook" by Jan L. Mayes. She is an audiologist who herself has tinnitus and hyperacusis for many years. She talks about having a coping toolbox. It has practical information (hearing aids, hearing protection, sound therapy etc) but also mind therapy tools.
"Making Friends With Your Tinnitus" by Libby Cunniffe. It too has a section on mind tools.
I hope you feel better soon. We are all here for you.