Welcome @trucha !
I’ve not read this entire thread, but I will go ahead and reply to your original question anyways. I’m sure many of the other wonderful, wise folks on the forum have already replied, but perhaps another case of success might bring you more encouragement and determination.
I started with a simple keto plan. (At this point, I was almost 52 yrs old. Had already undergone 5 knee surgeries, had a slipped disc in my lower back, and weighed somewhere in the 240’s, at 5’8".) I added in Intermittent and extended fasting. Read about carnivore, and watched several YouTube videos about it. One of the most powerful was from Mikhala Peterson. Decided to try carnivore. After I finished a 7 day fast, I went hardcore into carnivore. Days 3-5 were excruciating.Learned about insoluable oxalates, lectins and all kinds of ugly stuff - but of particular interest was the phenomenon referred to as an “Oxalate Dump.” Basically, the body purges itself of these nasties. And, because the oxalates are like tiny spike covered balls bouncing around throughout the body, joints and such - well, it hurts. ALOT. But WOWEeeeeeeee! After that, I felt fabulous! At 53, I felt better than I did in high school. I could outrun my kids, well, 4 out of 5 of them.(Grandkids…eh…not so much.) But you get what I mean.
But, like you, I am a veggiesaurus especially in the summer. Its been very hard to stay carnivore at times… My garden is the size of the local Dollar General store. I grow alot of stuff. 1 -2 days a month, I might have a few veggies, but,only the cruciferous like broccoli, brussels sprouts or cauliflower. Might even nibble a couple green beans. But, I never EVER eat spinach or tomatoes. You know when you eat a leaf of raw spinach, there’s that weird, dry sensation on your tongue? Those are insoluable oxalates. I no longer grow spinach.
Fortunately, we raise grass fed beef cattle, breed turkeys, and also have a chickens (layers). So most all of my carnivore needs are living right here in my yard. )I do enjoy salmon or Lake Trout once in awhile.)
Clean carnivore for several months - without any cheats - is really the way to go if you truly want to find out how good you can feel. I mixed it with IF and EF because, I’ll tell ya, after eating a 1-2 ribeye steaks with butter, I can go DAYS before I feel hungry again. It is an amazing feeling.
So, don’t give up. Go all in. And, I wish you the best.