My paternal grandmother ignored warnings since her pregnancies that she could be prone to T2 diabetes - sadly one day in her 60's she went completely blind. Since then I have been constantly nagged by my parents about metabolic syndrome and T2...so a bit of a shock to be diagnosed as late onset T1 (autoimmune) in my 50's...that said I seem to also be severely carb sensitive, so the horrible double whammy - insulin bolus requirements stay very high after any carbs.
Take a day at a time - I also classify myself as an addictive personality and in spite of knowing better, salty crunchy stuff is my downfall (crisps!, OMG popcorn). So with zero willpower, but living on my own, no crisps, bread, pasta, noodles, carby veg in the house. I have lost my sweet tooth so not tempted by biscuits, cakes, etc still on hand to treat my handyman and gardeners. Gradually going more carnivore in my diet - the side effect is that I now crave(?!) lettuce (albeit with homemade french dressing and grated parmesan)
. I eat at least a dozen eggs a week.
Just start every day afresh - remember that all those success stories probably have 4x struggling diabetics that haven't posted. Main thing is not to give up. That you are posting here to describe your despair is a great beginning. You CAN do this.