I have been there op you have my sympathies. Ime you have several issues to beat:
- snacking habits
- sugar/insulin cycle
- probably other factors like sleep & stress
I find trying to eat nothing doesn't work , you can't beat both the snack habit AND the sugar /cycle at the same time so work on separating them, by accepting you are goimg to snack, but swapping in non sugar/carb stuff. My top tips, have loads of the following available
Raw carrots, celery, beetroot, peppers, cherry tomatoes, cucumber plus some hummous, or salsa or balsamic vinegar and olive oil shaken up. Not ketchup or any other processed sauces. Accept that you are going to graze on these almost constantly, don't try not to. Make them v accessible and ready to eat.
Every time you boredly crave a snack, make a hot drink but no sugar or sweeteners . Teas, coffees, miso soup or bovril. Vary it up, swap in things like peppermint tea. Give your palate a big range of varied flavours.
If you can do these, you give your body a chance over a few days to shake off the sugar cycle. Then it gets easier.
Another route is to realise processed food makes this worse. Everything about it is easy to eat its so palatable and sweet and its full of chemicals that trick your brain. To start with, trying making simple home made cakes biscuits so you actually know what goes in them. They will also fuck less with your blood sugar/brain.