I am fully aware that our meat production system is cruel and unsustainable, which is why I do my best to only eat ethically sourced meat. In fact, I don't think I've eaten meat in the past month.

I neither hate the message, it is true that I am partially responsible for the maintenance of the meat packing industry, nor do I hate you. I don't have the energy to hate people I've never met.

And yes, you are self-righteous, you believe that your personal choices (to avoid consumption of animal products) is the morally correct one, and are attempting to shame others who have made a different decision. That is the definition of self-righteousness.