Try a brew of slipper elm inner bark powder dissolved in hot water before a meal, especially one with harder to digest foods (raw produce, meat/fish). The inner bark portion adds slip. It may be a game changer. I was just using it before an easy-to-digest breakfast. Now I drink this "tea" before my three main meals. I am only 2-3 day into this new routine but amazed how much better my system works. I have a severely redundant colon too (but not torturous). It's definitely a specialty product, and since Covid, seems to only have a few suppliers.