In breaking a sugar/carb addiction you can easily self sabotage by giving into cravings with a strong physiological base and then beat yourself up because your will power is not strong enough - which leads to comfort eating.
For a couple of weeks get rid of all carbs and fruit that you can snack on - whilst telling yourself they are healthy - and give yourself permission to eat as much as you want of proteins and fat.
If you have denied yourself butter, full fat milk, cream etc (I have a cheese phobia so don't know if that is ok) you will feel you are treating yourself. So have chicken, salmon, tuna, steak, lamb, duck etc (twice as much as you normally have) in a creamy sauce with green salad with full fat mayo and balsamic vinegar but no chips/potatoes etc. Snack on precooked protein, ham, chicken or even peanuts. I took a multi vitamin and mineral supplement to be on the safe side.
My whole metabolism and hormone profile changed in a matter of weeks and the addictive cycle was broken. I was in control and could experiment with adding things I wanted to one at a time. Turns out that starches are not that great so I choose not to eat bread, potatoes, rice, pasta etc.
I won't pretend this was my first option because it seemed so extreme but I had been diagnosed with PCOS and wanted to see if a blood sugar controlled diet could work as well as Metformin with less side effects when not overweight. It worked and I have followed these principles for the last 20+ years. It not only restored fertility but enabled me to maintain weight, despite menopause.