Oh wow, you could be my twin. Same drug reactions (you stuck with Byetta for a month !!?, I quit after two shots), same slow increase of insulin resistance, totally unable to lose weight, and the icing on the cake, first referral to an abysmally **** consultant. Also beginning with diabetic-related problems, but I'm 17 years in, so....
First thing you have to do is get yourself a diabetic team that YOU are happy with. Your GP can refer you to any hospital diabetes department that you are willing to travel to, so shop around, find a good consultant (word of mouth or web reviews etc.) and get referred there. If you're happy with your gp and nurse that's good, otherwise, again, shop around. My doctors surgery has one gp who is extra interested in diabetes and willingly takes all diabetic transfer patients. Some places you get a choice of who does the diabetic eye screening and some you don't. Oh, and ask your consultant to cc you on all letters to your gp - amazing what you find out that way.
Never listen to a dietician. Mine told me to eat more carbs and reduce insulin too. I asked her if she also recommended alcohol to patients with liver failure, and got kicked out of the clinic.
You have to be in charge of your treatment. If you want to go on a dafne/desmond type course, you have to demand that from a doctor.
Most important, though, regardless of past damage, you need to stop more damage being done. Keep your blood glucose within limits. Test and test again (I can't believe I'm saying this, I hate testing, it hurts and its messy). You might want to consider if a pump would be helpful, I found the ability to change basal rates for different levels of exercise made a huge difference - something to discuss with a good consultant.
Good luck.