Has Anyone SUCCESSFULLY Given Up Sugar & Flour?

It doesn't work for everyone, but I'm not the only one I've here who's said this: My cravings for less nutrient-dense sweets (baked goods, candy) were significantly reduced when I started making it a point to eat at least 3 daily servings of whole fruit. It took will power at first, but the sweets cravings faded in a few weeks.

Improving sleep quality/quantity (if sub-par) can help with cravings generally but sweets cravings specifically, as can finding stress management techniques if stress level is high.

To some extent, training ourselves is not that different from training a puppy. If we give in, and let it up on the couch when we said it couldn't go there, it will always try to go there. Only consistently requiring and reinforcing the change will make that behavior stick. (Yes, that stinks, in practice.)

That said, I didn't stop eating sugar or flour, because reasonable amounts of them aren't a problem, and I personally don't do well with "never eat this" type restrictions of foods I enjoy. Eating some of them keeps my desire from growingGrowingGROWING, and keeps my inner rebel under good management. Some people can't moderate some foods. Some people (like me) find it counterproductive to restrict foods totally. You'll kind of need to figure out your individual personality profile, on this front.

I did manage my weight, and nutrition, without imposing "never eat" rules. That may or may not work for you.

P.S. Self-definition is really important: We get what we expect of ourselves, to a large extent. You say "I cannot stop eating it". Can you find a way to turn that into "I haven't figured out how to stop/limit eating it, but I'm working on that", create yourself a little cognitive wiggle room for making change?

If these things are super difficult, there are therapists who specialize in this sort of thing, and (if cost/access is a problem) books that can help you apply some of the same techniques to yourself. There should be no stigma in turning to experts, when we need help with this. If we need help on the nutrition front we see a registered dietitian; if we need help on the exercise front, we go to a personal trainer or physical therapist. If we have difficulty with our thought/behavior patterns around food, that's the kind of case where we should seek out a therapist - it's no different.