First, I'm so sorry you're going through this illness and hope that you make a full recovery.
But I think that, to some degree, your feelings about the medical profession is a reflection of just how good medicine is these days. People go to the doctor expecting an accurate diagnosis and a treatment or cure. And, to be fair, 80% of the time, that's what they get. It's hard to overstate just how much of a radical shift in expectations this is.
Just a century ago, a compound fracture could be a death sentence. People randomly got sick a just dropped dead. Going to a doctor might, maybe, if you were lucky, fix what ailed you. Hell, just two centuries ago, doctors as we think of them today simply did not exist. Three centuries ago, people in Europe were routinely bled to balance the humors.
Biological systems are mind-numbingly complex. All the simple stuff has been figured out -- and if they are diseases mostly eradicated. Even so, I think that people's expectations of what doctors do is a bit... off. 99% of doctors are not scientists -- they are human body mechanics. And that means they mostly focus on common problems. Because, you know, they're common.
And neurological conditions are some of the most difficult to diagnose. Imaging techniques like MRI or CT often show no problems. Exploratory surgery is highly risky and also usually have no benefit. To extend the mechanic analogy, imagine going to your mechanic and saying "my car's GPS system is sluggish. sometimes. What's wrong?" and then expecting them to figure out what's wrong without being able to look "under the hood" of the computer system. All they can is use the GPS system and observe its behavior. That's essentially what neurologists have to do quite often. Tough job.
The good news is that there are doctors who engage in research. And they are, by trial and error, improving the state of the art of medicine. Does this knowledge get propagated to all other doctors rapidly enough? Probably not. But the knowledge dissemination is probably better today than ever before too. Obviously things can be improved. As pretty much anything can be improved. It just doesn't seem very helpful to spout "doctors are idiots" as some other posts seem to do.