My A1c runs around 32 (5.1).
You should not have to snack all day each day to bring up or keep your levels higher. Ease up. If you have to do a basal test, do so. And it sounds like you know your IC ratio might be too strong. You know what you feel like when you go too low, it's yucky so why would you want that? Besides it not being good for you or safe. Let your numbers level off at a higher number and then you can tentatively start to tighten control for "better" control if that is what you want, but that also means not dropping too much. I don't like "too highs" either, but I don't go too low to achieve that. Less than 1% of the time do I drop below 3.9 (70).
Think about how much nicer to not have to worry about snacking all day or worrying about dropping too low. It sounds like you've gotten into some kind of pattern of control that's not good. Talk to your diabetic team or endo if that's who you use to determine your insulin amounts and what adjustments need to be done. But honestly, there isn't a good reason for you to have to keep fighting from going too low.
https://integrateddiabetes.com/basal-testing/