After you look at these images of meat-packing facilities from early last century, you'll understand why social reformer Upton Sinclair wrote his great 1906 novel The Jungleabout workers' horrific experiences in the meat packing industry.
The mince meat department in Armour's great packing house, Chicago, c. 1893
I don't understand why any of these are "utterly disturbing" — this is where all the meat that you eat comes from, and has for over a century. And should our modern society one day collapse, on a smaller scale, if you want to eat meat, this is how it will be done.
People need to get over their squeamishness about killing livestock. Learn to hunt and go hunting, you'll get over it, and you'll also learn to appreciate the animal(s) you're eating.