I have been all of those things at various points in my life.
I really struggled with the vegan lifestyle. I can't really eat bread or pasta because they upset my guts, and I hate potatoes. As a result, most of the free kicks in terms of energy density were off the table.
I'm a pretty big guy, and I have a super active job and active hobbies. I ended up having to eat an inhuman amount of roughage to get to the point where I stopped losing weight.
Further still I constantly felt as if I were actively fermenting some kind of wicked brew inside me. I could NOT stop farting. For almost 12 months I lived with this. All the time: In work meetings, in bed with my wife, in my motorcycle gear, in the work truck...farting. Worst of all was in the shower. I'd let a dirty vegan fart rip through sheer necessity, already knowing that the hot water would keep pounding it down and recirculating it through my nostrils but not being able to do anything about it. It was in the shower one day where I burst into tears from chewing my own farts at four o'clock in the morning that I decided I'd had enough.
I then went in completely the opposite direction and ate nothing BUT meat for 3 months. All of my digestive symptoms cleared up, my skin and hair looked amazing and I'd developed the ability to chase down wild game in the dead of night. Overall though I didn't feel all that healthy and I could not stand the sight of another plate of meat so I threw that in the bin too and went back to being an omnivore.
At some point during this whole charade I hooked up with one of my rural neighbours who offered to sell me half a beast. Here's where the 2 year thing comes from. Most people do not realise how much meat is in a cow. It is a fucking shitload.
HALF a cow easily fed me for an entire year when I mixed it with a wide array of vegetables, eggs, nuts and legumes - and I gave a heap of it away!
Therefore, I have had to accept that the cost of sustaining my life on this planet is 0.5 large cows per year. I do my best to return that value or greater to the world every year, and one of my acts of service is making confusing internet posts on forums that I don't remember signing up for.
Factory farming is deplorable and extremely difficult to avoid when you shop at grocery stores. The fact that it has to exist as an industry at all whispers to me that there might just be a few too many billion omnivores on this planet to feed. My own personal problems stem from the fact that I've contributed to that issue: there are now 4 mouths to feed in my house! They don't need as much meat in their diet as I do, but that still increases my household footprint above 0.5 cows per year.
If I look out of the window behind me right now, I can see old Bessy lounging by the dam in a paddock filled with lush green grass. Sometimes birds land on her but she doesn't seem to mind, she's pretty chill like that. She has a deep love of carrots but is unreasonably afraid of whole cabbages. I assume they make her fart.
I've watched Bessy enjoy life for the last 2 years, but come mid spring a loud report will echo off the hillside. I will have to deal with the mess, and the emotional upset of my children who haven't quite mastered the art of passive detachment just yet.
One day when they are old enough, they will have to participate in the butchering if they want to eat meat. I expect I will raise a household of vegetarians and I'm ok with that. They don't mind collecting the chicken's eggs and we usually have at least 4 or 5 who survive their free range life long enough to reproduce. We don't eat a lot of chickens because the maths isn't very good.