Obstacle Maker
Someone who adds problems where there are none. They get off on watching you stress out and probably get a kick out of your misery.
My math teacher is an obstacle maker. He gave me a test on Friday when I had no time to study.
My neighbor is an obstacle maker. She turned on her lawn sprinkler at 10 PM on a Tuesday.
My friend is an obstacle maker. He told my crush I was a total loser just to watch me flinch.