The diet you described in Message 16 has some good aspects, like decreasing your carbohydrate intake, hopefully with emphasis on eliiminating simple carbohydrates, but it sounds like one of the variants of a keto diet, which are all fad diets. You're looking for a magic bullet. There isn't one. All diet programs are failures.
The long term success rate of diets in the general population is 10-20%. Under most circumstances such a low success rate would be the death knell and people would abandon them in droves, but many Americans are desperate to lose weight, and so the diet industry has been with us for a long time and will continue to be so, regularly introducing new appealingly packaged diet programs accompanied by food products you can order online or even find in your grocery store.
Terms like fat adaptation and achieving ketosis to burn fat is terminology used by diet quacks to sound plausible and scientific. If you're not seeing an MD then you're seeing a quack, though even some MD's are quacks - Trump's doctor from before his election was a quack. The White House physician Ronny Jackson adopted some quacky qualities over time, perhaps influenced by his increasing use of alcohol and pills.
The best diet advice is from Michal Pollan: "Eat food, not too much, mostly plants." Inherent in his advice is to avoid processed foods (that means avoid most aisles in the grocery store).
Your issues sound persistent and of longstanding. I think Metformin would be inadequate for you, though it's probably worth a try if you haven't tried it already. When metformin doesn't work then the next thing to consider is semaglutide. You would take it under the care of a medical specialist, usually a specialist in diabetes. A responsible MD will prefer to use it with those already eating right and getting regular exercise because semaglutide is only an assist (a powerful one) for achieving a healthy weight and better numbers on the standard blood panel. It cannot by itself make metabolic syndrome or diabetes go away. Semaglutide is approved by the FDA for treatment of diabetes, and from what you say you're a valid candidate for it, but if not you need to find an MD willing to go off-label and prescribe semaglutide for weight loss. The FDA is on the cusp of approving a higher dosage version of semaglutide for weight loss, if they haven't already. Cost is around $800/month, you'll need your insurance.
That equates to a blood sugar of around 270, a very dangerous level. You're at high risk for complications like heart disease, neuropathy, kidney damage or failure, vision damage or even blindness, and vascular cognitive impairment.
That last one, vascular cognitive impairment, would explain the gibberish you've been posting recently. I assume friends and coworkers are beginning to give you odd looks after you speak or do something. I assume your life is becoming increasingly chaotic as you become less and less able to manage the routine activities of daily life, such as taking medicine, buying groceries, doing laundry, preparing meals, paying bills, etc.
Three years ago your A1C% was 7. That it's now 11 means you're not even trying. I'm guessing you've let your weight balloon, you're probably above 230 now. If you were following any legitimate diet at all your A1C would not be anywhere near 11. You may be in a mental state that makes it difficult to reliably follow a diet or medical directions.
You didn't answer my questions. The one about metformin is irrelevant now - an A1C% of 11 is way beyond what metformin is appropriate for.
At an A1C% of 11 you must be on insulin. If you're not get on it immediately.
I don't know if semaglutide is appropriate at your A1C% level, you'd have to seek medical advice.
About your doctor, is he the one who talked about "full ketogenic adaptation"? The one under whose care your A1C% has risen to 11? If so then run, don't walk, to a highly respected diabetes center. Possibilities are the Barbara Davis Center for Diabetes or the UCHealth Diabetes and Endocrinology Clinic, but there must be many high quality providers in the Denver area.