On Good and Evil Yes you can be evil. For example, over consumption of animals is evil because the toll on life that you would admit to not wanting to experience yourself, and because that's present to the senses (the toll), and because of massively consuming them, it is evil.
You, animal slaughterer, from the third person have wasted good animals over the course of many years. Therefore, you are evil.
So what is evil? Evil is, regarding the Status Quo, what was done wrong; Earth life is not for your pleasure, as you can see lots of other things exist, so when eating a burger, that's potentially wrong, based on principles such as: quality of existence, quantity of pain. If you offer poor quality of life, should you receive the same treatment?
Earth would have flourished on its own better than with us, our world is impacted by evil. What is evil, therefore, it is stupidity regarding the greater scheme of things.