Hi
@Happy hippy
I've been following this thread since you started it, but haven't chipped in because my issue was rather different.
However, I can confirm that for me, going carnivore was the single best thing I did to settle my gut stuff down.
Please don't take that as any kind of suggestion that you will find the same thing.
Long story short:
Got Ghiardia, got rather ill, for a long time (basically irritable bowel), got gut permeability, felt v rough, malnutrition through malabsorption, couldn't tolerate any fibre at all, leaving me with meat, fish, eggs, cheese that worked. Also white carbs, but obviously couldn't tolerate them as a T2. Most people are over Ghiardia in weeks, but it took 2+ years for me to recover. Am now, still, rather scared of fibre in any veg form, but (strangely) can tolerate nuts.
Never for a moment in the past 50 years did I contemplate giving up veg - they were an endlessly interesting and varied part of my diet. However, following over 3 months in the loo, I embraced carnivore with a feeling of delighted liberation, and have been happy eating it since. There was a weird period of transition though, while my poor digestive tract emerged from its shocked and traumatised state and actually began to digest what I was eating.
Problem foods for me are most (all) veg, and any gluten, also FODMAP foods.