Animals are part of this thing called the cycle of life that has been going on since near the beginning of the earth and will go on long after humanity has faded to dust. Being eaten is normal, it's part of how ecosystems are regulated, and everything dies anyhow so why not be a meal on the way out so that something else can live.

If you want to direct your rage somewhere, direct it at the people who force these animals into concentration camp like environments to maximize production. That's the true evil, not eating meat.