There is a very good reason why people who eat certain kinds of meat may end up with bad health outcomes: much of our meat supply is filled with solutions containing inorganic phosphates. I did some research on these inorganic phosphates, like sodium phosphate, and learned that they are associated not only with worsening kidney health, but also with clogged arteries. They aren't metabolized the way organic phosphates are--the stuff that you find in animal tissues and DNA. So they basically precipitate out as tiny bits of rock when they react with other minerals in your body. Even the prepared meats at places people think of as "healthy" like Trader Joe's and Whole Foods can have those added phosphates.
So if you are eating processed and prepared meats, you are getting these damaging additives.
The other big issue, of course, is that animals store the fat soluble pollutants they take in, in their body fat. So if they are exposed to pesticides and herbicides, which most are, even organic, since these can be in water supplies, the fat of these animals may be bad for you.
Personally, I avoid phosphates as much as possible, because the research I've seen on them is compelling. I do eat red meat, but only stuff I've bought as unprocessed meats. I also don't eat it that often any more, mostly because I burnt out on eating so much of it during my very strict low carb years, and I never eat at fast food places.
But when I think back to my years of eating strict low carb back in the late 90s, especially, when we didn't know as much about what was in our food, I know I was eating an awful lot of junk meat that probably wasn't great for me. But hey, I'm still alive, and intend to stay that way for quite a while longer!