Some doctors are just plain ignorant, though it does not help matters that some of the textbooks for introductory pharmacology classes taught to nurses and doctors do not mention the majority of the possible side effects for the statins (at least they did not here in the United States when I took an online pharmacology class four years ago through my local community college system). Get lists of side effects from the manufacturer's website or the Mayo Clinic's website and keep trying. Also, Dr. Beatrice Golomb heads the 'Statin Effects Study' at the University of California at San Diego, so they keep a lot of good information out there, as does Dr. Duane Graveline (former NASA science astronaut and retired family practice doctor) on his website (he suffered from bouts of transient global amnesia when his doctor at NASA put him on Lipitor for a while about 15 years ago). Anyway, best wishes on this.
My own bad experiences with statins were through Veterans Affairs/Administration (VA) here in the U.S. While my HDL levels were good, they were putting as many veterans as possible on the darn stuff. Unfortunately, my cholesterol was resistant to coming down with simvastatin, so I spent only 4 months at 20mg simvastatin before they bumped it up to 40mg for two year, then 80mg for 16 months. They sent only a very abbreviated list of side effects with the prescription (muscle problems and the possibility of liver damage) printed on what amounted to a wide thermal-style cash register receipt paper (faded after about 2-3 months so you could not read it). I suffered from increased levels of anger and irritability, my carpal tunnel symptoms got much worse (which I self-medicated with more aspirin, which got to be ridiculous at 40 or more per day and probably covered up a ton of muscle pain), unannounced extremely explosive and watery diarrhea, nasal congestion, memory issues, my fasting blood sugar level went up by 16 point (went back down again after I stopped taking simvastatin), and a number of others. I've also met people whose muscle pain within two months of starting a statin was so bad that they hated going up and down the stairs in their own home because of the pain. Also, there is information out there that states that a lot of athletes won't take statins because it messes up their athletic perfomance.
The statins mess up such things as your seratonin levels, vitamin D levels, testosterone levels, coQ10 levels, cortisol levels, and several brain neurotransmitters, among others. Dr. Peter Langsjoen down in Texas studies how statins increase the risk of congestive heart failure, though that can be relieved somewhat by supplementing the statin with coQ10 (enzyme cofactor that all of your cells use in releasing energy for cell use). There have also been rare reports of acute pancreatitis or interstitial lung disease associated with statin use.
Anyway, keep fighting. Insist to your doctor that you'd like to back off the statin and see if your symptoms back off any. Talk your equivalent of malpractice if he/she objects. Remember, just as some people are allergic to penicillin, some people can be more sensitive to statins than other people are.
Best wishes for your improved health.