I can relate to much you re saying, and I agree that factory farming, mega agricultural and fish farms and the like are not only NOT feeding the world, but are poisoning out planet at an ever-increasing rate. There are better ways.
I've been growing organically for over thirty years, so from that standpoint, you're preaching to the choir. We're not growing all our food yet, but we're coming closer every year, and I've been writing about various methods of growing and preparing our own food for well over a decade.
It is easier than people think, and doesn't have to take a lot of space, if you're willing to think outside the box. I specialize in orcharding and perennial vegetables, which require a whole lot less work overall than traditional market gardening, and keep producing year after year.
As for the mistreatment of animals, I agree, it is a huge problem, and I choose not to support it. That said, I disagree that all meat and dairy animals are mistreated, as I know a number of farmers who not only don't mistreat their animals, but their animals live far better than a lot of humans do.
One friend in particular has the most spoiled rotten goats you've ever seen, and they thoroughly enjoy being milked, so they are far from suffering. Our goats are wethers, which is to say altered males, so no milking duties here as yet, but they're pretty spoiled as well. ;-)
And as I said I do plan on getting milking goats and (hopefully) a cow in the future, and we have enough land that they will have plenty of forage, protection from predators, and lots of love and care. As all animals should.
I should also note that I've been accused, since childhood, of making pets of everything, which is true. ;-)