I remember seeing a similar argument "proving" that god doesn't exist. It goes more or less like
1 - The creation of the universe is the greatest achievement imaginable
2 - The merit of an action consists of an intrinsic greatness and the ability of the creator
3 - The greater the handicap to the creator, the greater the action
4 - The biggest handicap to a creator is non-existence
5 - Therefore, if the universe was created by a creator, it would be a greater achievement if the creator was non-existing than otherwise
6 - God does not exist

Edit: Upon further research, this is called Gasking's proof.