Antibiotics (and the antibiotic resistant bacteria we now enjoy because of the ocean of antibiotics used in meat farming), hormones, environmental destruction on a scale only matched by the fossil fuels industry, and increased risk of a number of cancers and other age-related diseases.
The vast majority of meat consumed is not "good meat", by your definition, and never will be. Consumption of good meat by all the meat eaters of the world is not ecologically or economically feasible. It is irresponsible to pretend that it is.
It's worth discussing what makes "good meat" good, but it's not useful to imagine a world where several billion people can eat organic grass-fed beef every day, because that way lies destruction for all of us.