It's better to attempt elimination diets rather than a single type (low-fodmap, specific carb, carnivore, etc.) What works for one person may not work for everybody.
The carnivore diet is the ultimate elimination diet. The strict version (in which you eat nothing but ribeye steak) is nutritionally 100% complete and there are people who have been thriving on this diet for over a decade now. Meat is the food that human beings evolved on. Just try it and see for yourself.