Nerve replacement? Maybe sometime in the future, but I don't think they can do that yet.
Imagine how great that would be, getting damaged nerves actually removed and then replaced with brand new ones cloned and grown from your body's own nerve cells, functioning perfectly.
Or maybe not so perfectly. Imagine you could say, "Yeah, you know what? I tend to be a little clumsy, so I wouldn't mind if the nerve you're putting in my big toe was kind of on the sluggish side...less *responsive* than the old one."
I've had 3 surgeries, BTL. The emergency one immediately after the accident, then another a few years later to correct and adjust the first one, and then another in 2016 to replace old hardware, shave off a bunch of arthritis, and straighten my spine more. And during that one, the surgeon spotted a tiny, probably genetic deformity of a nerve root that was an obvious source of pain, and he did what he could to make that less deleterious.
Weeks of physical therapy always followed the surgeries, but I was lucky to get excellent PT technicians. Probably because the fall happened in a state park and it was due to negligence, so the state provided the therapists (and ultimately covered the costs). I haven't had really good physical therapy since 2016. The only thing on offer is the one-size-fits-all routine that hurts more than it helps, so I do my own routine here at home. Mostly body-weight traction, certain yoga positions, and some Tai chi soft-moves for balance.
I've also had acupuncture and lots of chiropractic and massage therapies. The relief is always temporary. Since pain is an energy thief, and my liver damage is, too, I take energy-boosting supplements everyday; mostly B vitamins but also iron, niacin, ginseng, and taurine. I also take several hundred mg of magnesium every other day and I drink a lot of herbal tea.
There isn't much anyone can do for nerve pain because medical science doesn't know as much as they need to yet. As long as pharmaceutical companies are allowed to fund the research, all we're ever gonna get is pills that are more magical than the previous ones and barriers to obtaining unprofitable, more natural ones like opiates.
"I asked them if I had to go home and suffer." The industry doesn't care about your suffering. Your doctor might care very much, but s/he has to play ball with the industry. His or her career depends on it.