How did you correct and make your progress? Did you see a specialist of some type?
It's been a long and rather convoluted journey. I'm the type (now) when I try to learn something I tend to obsess and go all out. I made a decision in the fall of 2014 to really learn to ski well this time. I did a ton of reading and research and talked to hordes of different people, took loads of lessons and asked my instructors more questions than they wanted to answer.
As I would take lessons and not understand or not progress I would research what else was out there and started making incremental changes. My first breakthroughs came from a great local boot fitter who gave me the heel lift. Those boots started to be problematic last year when the liner packed out and I went through a ton of changes trying to figure out why the boots that had worked last season were failing me.
Ultimately I ended up at Harb Ski Systems in Colorado who helped me to understand the biomechanics at work. They made me aware that my boot was too big which meant that with the packed out liner I was being locked into an even more upright stance than my original boots intended.
That was the point I realized how much individual anatomy mattered as my local boot fitter was pretty good, but he put me in a boot that worked well for most of his customers and was OK for me with a new liner but was a disaster for me when the liner packed out and the boots needed to be fastened tighter.
At first HSS just modified my boot trying to make them work (with an intuition liner), but I was having horrible pain because I had to over tighten the boot so it wouldn't slosh around. I finally ended up in a size smaller low volume race oriented boot that doesn't hurt because it is generally so all over tight & enveloping I barely buckle it and could ski with it unbuckled. So no pressure points. Weird, right.
Stance wise when the liner packed out I felt like I lost the benefit of the heel lift so I started trying to figure out what was going on and figured out a boot with a more upright stance will hold you even more upright if tightly buckled but then couldn't get a bigger heel lift in the boot so that's when I ran across the ramp delta concept for bindings.
There was more going on than described but I really don't want to bore you with a five page post and the other stuff relates mostly to a latent knee injury and years of stem christie skiing that I picked up on straight skis in the 70's that wouldn't go away.
I think the most valuable things that I learned and would pass along is don't give up, and don't just assume you suck (as it is I've noticed on this forum women tend to degrade their skill level well below where most men would categorize themselves, I think most men will call themselves experts if they can get down a black run without dying) think about what's going on, ask questions, play devil's advocate.
One of my favorite things to do is ask the question "How could both this expert/instructor/well respected industry person be right and their technique/advice still not work for me". When I look at things from that perspective I get different kinds of answers (actually it just gives me 50 new questions to research which ultimately gives me answers).
Because of my analytical nature and my background, HSS works well for me, and it's the best bootfitting experience I've ever had. However, I can't say they'll work for everybody. They have a very specific and different philosophy and outlook on skiing that can be very controversial. For those in the anti HSS camp, please don't flame me, I'm just saying they are a good fit for me.
I would entreat people to not settle and not give up. To me it's very important to remember that skiing, skis, and skiboots were originally designed for men and it's only relatively recently that Jeannie Thoren made her mark and equipment began to be modified for women (contrast 45-50 years of modern boot/binding technology in development for men with maybe 10+ years of real research and progress in women's skiing needs since the pink it and shrink it era) so lots is still being worked out and much of it is contradictory.
For instance some (including Thoren) say women need ramp delta and heel lifts to deal with the difference in location of their center of mass, but at least two companies have (at least in the past) made modifications to decrease lift or delta because they felt that that put increased strain on the ACL. Knee Bindings has 6mm of ramp delta on their bindings for men but 3 on their bindings for women and I believe part of Volkls major redesign of their women's on piste line a few years ago included reverse ramp delta to reduce the risk of ACL injury in women.
They both have valid arguments, but nobody seeems to talk about what different innovations are trying to do nor be aware of possible interactions, or take care to sort out women and maybe only put women with good dorsiflexion on the Volkl or make sure that women who already have ligament issues look at that set up.
Can you imagine shelling out a ton of money for a special women's ski that gives you reverse delta and special women's boots that give you regular delta. You've gone and spent a fortune not realizing that the innovations you've paid through the nose for are being cancelled out.
Anyway back to general advice, besides not automatically assuming you suck and it must be your fault, I'd also recommend watching video of yourself, and for sure anything an instructor tells you to do while skiing make sure you can do while standing still, and get independent verification (video or a friend who doesn't mind hurting your feelings to confirm you are doing what you think you are doing).
PowGirl, definitely try the lifts, and exactly what type of nerve damage do you have and has anyone had a conversation with you about your gardening supplies & whether anything you use could have neurotoxic effects. If I remember correctly there are some gardening chemicals that might cause problems.
Sorry for the long post............