dear piotr, even the predator is in the end the prey. so these are foolish concepts that don’t help us see reality.
every living thing is nourished by something. it is not the predator’s act that we are considering, the taking, but the giving.
the question is what you are nourishing.
you are a little nietzschean, and that is most likely what is at the root of your struggles with people and life.