It is most frustrating to have lost the recommended amount of weight and still be diabetic, and it must be even more so if you have undergone surgery. I have lost about 6 stone and am still diabetic, although slap bang in the middle of my ideal weight range. Unfortunately, for some of us weight loss seems to make not a great deal of difference to the diabetes.
I still spike if I eat just one small scone, my morning bgl can be high for no reason I can see and on the whole I am very careful with what I eat.
I think that your t2d was no doubt worsened by the medications, but I don't think it causes lada. Taking insulin should not make any difference to the tests.
The causes of t2d are still not clearly understood. While weight clearly plays an important role, it is far from the only cause or contributing factor. For example, I have hypothyroidism and a substantial number of people with hypothyroidism also develop t2d., far more than should be expected. But the link unclear.
I feel that although I am still diabetic, which is a bad thing, I am at least much lighter, whichis a good thing! I can move far more easily, I sleep better, walk better and have taken up old hobbies.
How are your other health problems? Is the retinopathy any better?