Tweetmeat and eggs are not garbage brother. Clean diet with both you will be healthier than a vegan. Also much of "game changers" has been de-bunked as vegan propaganda.
We are not meant to eat just plant matter. In a western diet we do tend to eat WAY too much meat and not enough veggies. THAT is where the disparity comes from. Not the meat or eggs. I train with high level amateur fighters and sometimes pros come in for sparring/seminars ect. They are all looking for an edge, any edge because every small edge adds up. Many of them say they tried vegan/vegetarian and every one I met says they went back to meat and eggs and feel better. They must clean up their diet and get rid of pizza and burgers and that stuff.
OVEREATING of meat and dairy can cause problems. Never tried vegan honestly though.
Debunking the Game Changers with Joe Rogan | Chris Kresser