I'm new to construct, so i may be wrong about this; i believe the bullet behavior is made so that a sprite will always move in a set direction at a specific angle, or in a set direction while rotating the sprite.
What you are after may be the behavior named "Custom movement", however it feels like the monster is running on ice, perhaps it is possible to tweak it so it is more like the bullet movement.
Here is a capx where i used the custom movement.
dropbox.com/s/10rwjvz6pzx5g1s/movement.capx
You might be able to use the path finding behavior but i do not know how to use it yet.