A very interesting paper was released not too long ago. It shows that administrating blood plasma of young rats reverses aging in older rats! The doctor you mentioned seems to be very enthusiastic about it.Even if that researcher is correct, the good news is that anti-aging science and technology like CRISPR is coming a long way! I really think we're going to see our lifespans grow drastically in the next few decades...
You may have to wait a long time to totally get your life back (I know this is torture), but there's a good chance it won't be over for all intents and purposes by the time science catches up with your afflictions.
You might want to check out Dr. David Sinclair's research. The guy heads anti-aging research at Harvard... and coincidentally looks damn good for being fifty years old. He believes we'll actually be able to stop and even reverse aging within our lifetimes.
Hopefully, this prospect can help you and others to keep hanging in there.
This notion even helps me on bad days when I feel bummed out about having screwed up hearing in my mid 20's. I remind myself that I'll likely be able to take a pill and be 20 again one day - I view it all as a matter of patience.
https://www.biorxiv.org/content/10.1101/2020.05.07.082917v1.full.pdf
The paper is not yer peer reviewed, so take it with a grain of salt until then.