Agree with the above. Firstly, I am sorry about your incident. I hope it turns out to be less severe not not life changing. Ultimately, that is all that matters right now. It's way too early to be looking at the liability or negligence case. Rest and recovery is what you need.
I am a cyclist of many many years, and many falls both racing or commuting. There are roads i cycle daily or many times a week. Some are hazardous or perhaps not ideal for cycling on is a better way to put it, either with narrowness, surface, negative camber, gradient or any number of those things. When the roads are greasy, as they often are this time of year, I have to be ultra cautious, slow down etc.
Its my responsibility to cycle in a manner that is correct for the terrain, traffic or surface. I am not saying you didnt, but ultimately, today you fell and other days your did not. What made today more dangerous?
If I fall and its not my fault, I have to prove somebody was negligent or caused me to fall.
This has to be your next avenue and you must therefore get legal advice on the merits of a case. If this roadway is as hazardous as you say, you may not be the only person that has fallen. If that is the case, this will help build your case.
Rght now, no matter what you say in your first post (and I did read it and all your other posts) you don't have grounds for a case just because you fell. Cycling is hazardous, even if you are skilled, competent or experienced. This could just be another case where you fell off and it was no one's fault.
That may not be what you want to hear but that's how I, as a cyclist see it.
I wish you a speedy and full recovery.