I can say on a farm, processing poultry is probably the worst. Its a fair intuition that murdering a living creature cause its tasty is overall gonna be a nasty endeavor. But a farmer has to live on a land, often for generations and that death comes at the end of a whole lotta care and nurturing. Theres a balance.
But these companies aren't farms, and the disconnect of humanity from the work is the issue. That exploitation happens at all levels, to workers, to animals, to customers of the product. Thats the thing that has to be fought and it ain't as simple as just product type $X is bad as you shop at the same grocery chain owned by the same people supplied by the same suppliers.
https://www.fda.gov/safety/recalls-market-withdrawals-safety...
I can't imagine where you would get the idea that being a vegetarian somehow benefits you here, or why you would bring it up.