I tried to do this diet many years ago and I found that I was never satiated. Even eating a lot of nuts and beans didn't help. I was lethargic and moody. Had a hard time getting out of bed. My experiences there have actually led me to more of a keto/carnivore approach, and while I may get some flak for the sheer amount of animal protein I eat, I truly do feel leagues better. I eat very little sugars (although I did buy a pint of ice cream last night), very little grains. I eat mostly meat, fruit, and the odd vegetables from the garden. I also grow most of my food when in season, which I think helps largely.
What I have gotten out of this is that it's not so much whether you're eating carnivore, vegetarian, or anywhere in between. Ime, it has more to do with processed and in-season foods. For example, a tomato grown in full sun, in season, has far more nutrients than a tomato grown in a greenhouse out of season. A burger at a fast food joint is much less nourishing than a burger from a freshly butchered cow with no additives used. Canned green beans are much less than freshly picked green beans, etc.
So to me, the bottom line has more to do with the treatment of what you are eating, rather than what you are eating. I know this wasn't probably what you're looking for, but I felt it was relevant enough to comment. Have a wonderful day

May we continue to be blessed