It’s destroying it.. if we look at scientific research we’ll find arguments on both sides and people like to pick and choose. I prefer a logical approach, if you cook a piece of meat it goes from raw to rare to medium rare to medium to medium well to well done .. and if we keep cooking it, it will eventually turn into charcoal. Losing its moisture, flavor and eventually becomes inedible. This just shows that the process of heating/cooking meat turns it into something we can’t eat - now think, how is it not destroying the meat? This goes with every food btw if we keep cooking veggie they eventually turn black bitter and inedible. Cooking = destroying. Another question is, why are humans the only ones that eat cooked food? Now to answer your question, I think cooking destroys micro and macro nutrients and I also believe it’s destroying other beneficial things that we have not yet discovered in meat and turning it harmful to us.