I'm just going to say this because, well I believe it's common sense but as the medical profession isn't trained in nutrition and biochemistry they have no way to start helping people with CFS or indeed any chronic illness, and sadly people remain largely ignorant. It's not like the conspiracy theorists who claim 'THEY are trying to keep you ill'. No, it's not that at all, the medical profession is just plain ignorant and have no idea how to maintain wellness. So they try to treat individual symptoms without looking at the whole person.
The cause is largely down to nutritional deficiences. If you've had a virus, or a lot of stress, or injuries, infections, antibiotics...all these things take nutrients for your body to repair and heal, to get you back to normal. Today's food and soils are nutrient-depleted. I suspect not one of us gets all the nutrients we require on a daily basis. Our bodies are very good at keeping us going, but once we have a breakdown due to illness or stress, it can be difficult to get those optimal nutrient levels back. In fact they may fall far short of the ideal and as a result, all the biochemical processes needed to keep your body going start to suffer. Then you start on a downward spiral and more symptoms and illnesses occur.
There's no quick and easy answer to this. Doctors for sure aren't going to be able to help because they don't have the knowledge nor do they have the time to figure out each person's biochemical deficits. That leaves those of us afflicted to start searching online for anything that may give us a clue as to what's wrong, or may help. That can lead to going down a lot of rabbit holes and onto 'treatments' that are just plain dangerous and make things worse.
At the time I got Hashimoto's nearly a decade ago, I started going down those rabbit holes. I've found a few things that helped, others did harm, others I have no idea if they did anything at all! So we are on our own, basically, and every day lost to illness is a day lost where we could have been living a full life.
My current set up is to try to get my basic nutrients sorted out without having to take a hundred vitamin pills every day. I happened upon Understanding B12 deficiency on FB three years ago and have followed much of the protocol there to get me started, it's a group based on Dr Greg Russell-Jones (biochemist) research on B12. Some of the things there have really helped but of course it's not everything. A few people have made a great recovery (even from CFS!) Might be worth checking out if you are inclined, at least there's no weird and wonderful substances you have to take, just basic nutrients.
I really hate seeing so many people suffering when it's so unnecessary! We end up being part of a huge invisible population of people who are just getting by, miserably. It's got to change.