Your mind is working much like a dog that knows you will call it seven times, so it doesn’t even think of obeying and coming that first time!
You have created the bad habit of expecting to be unable to stop yourself from doing something harmful.
It is just a habit. You can break it. How? Start small. DO not start with your hardest thing. In fact, I recommend cheating. Pick something you can control yourself
on and use your Stop It.
So, if you aren’t addicted to chips, next time you have them, just announce Stop It, get up and put them away. Practice.
You can build a new habit by doing the skill you need in easier areas and later transferring it.