You should really try vegetables. I know bread is a processed plant product, but we generally don't count bread as a vegetable.
Poor people aren't living high on spinach and kale. They're eating butter sandwiches for lunch because they're too poor for nut spreads and jam. They're eating 5 boxes for 2$ mac dinners. They're checking which of the soup cans they bought on a 10 dollar for 10 cans sale years ago are still good (aka not puffy) even though they're long expired. The cheap vegetables are starchy roots, but even the 50c/lb carrots don't hold up to processed food prices.
You can spread out 1 cup of rice with 9 cups of water as a soup. I was stirfrying cabbage with almost no seasoning. And it would still be cheaper and more filling to indulge in mac dinners and hamburger helper.
The chips are a good idea, but my diet is already so limited to PB&J, hummus and cheese and mixed green sandwiches, and the occasional whole grain rotini + prego chunky garden (and mixed greens), oatmeal, apples, frozen blueberries, bananas, and the occasional frozen quinoa dish that chips and occasional ice cream or Italian ice are a nice change of pace.
I haven't had a soda or the like since, I think pre-COVID.
I just eat too much, and don't exercise enough. I could probably use more water, too, but I don't like using the restroom at work. I do find that when I'm working I can often not eat without feeling and hunger pains, but I usually make up for that by eating a lot at night when I get home.