I dreamed that I killed a big earthworm, and asked the relevant people to interpret the dream.

Have you noticed the appearance of the big earthworm, or does its head look like someone you know? There are two ways to explain this dream.

First, there is your competitor in real life, and your subconscious tells you that your ability exceeds him.

Second, the earthworm is your own incarnation. Killing it means you will have a new beginning.