Farm animals are not much better off than if they were in the wild. Sure, they get food, but they are slaughtered as soon as they reach full size. Dairy cows might have it a little better, depending on your point of view, but most of their babies certainly don't have it better.
What is animal abuse? Going by what gets media and court attention, it seems like the definition of animal abuse in America is treating dogs and cats as farm animals.
I'm not sure you understand what a dairy cow actually is from your post. You seem to be confusing dairy and beef cows which are completely different breeds, literally. A dairy cow isn't slaughtered for meat unless its diseased and going to be made into dog food. In that case, euthanasia is actually the most humane treatment (a short quick death instead of a long suffering death). And the female babies become dairy cows...the male babies become studs (a better life is hard to imagine) or veal. This mimics how cow herds actually work in the wild with females being preserved and males in a feast or famine situation. Generally a dairy cow has a pretty good life, the beef cows, not so much.
As someone who grew up on a farm, one of the biggest complaints I have about PETA (and their ilk) is that they seem to know nothing about how agriculture actually works but are very eager to change farming. This is a bit like putting hair dressers in charge of IT in your company. They are great at getting attention, as to producing the desired results, not so much...