Extreme fatigue and loose stools

I've been on the carnivore diet for over a year. Kept having energy issues and just felt lethargic all the time. I ate strict BBBE and no coffee or anything else other than water and salt. Some electrolytes too. A month ago I tried switching to the lion diet and hoped that would solve my issue but I'm still having loose stools after each meal. I tried eating lean steaks, fatty steaks, 80/20 ground beef and i still get diarrhea. I tried cutting back on the fat but I still get loose stools and I Just don't feel full. I've been on the lion diet now for about a month and I haven't noticed a single change except my anxiety has gotten a lot better. If anyone has any advice on how I can fix this I would be very appreciative! Also for meals I would make sure I ate at least 160-200g of fat and protien. I'm 6,1 and weigh 144 pounds so I'm on the leaner side. Thanks