Encouraging people to explain down-votes
I suspect this is happening to me because I there are no comments under my answer.
I think users should only be allowed to down-vote if they leave a comment as to why.
I could only find one answer of yours with a downvote, and that answer is a joke answer that isn't really useful. This is most probably also the reason it got downvoted, and why it will continue to be downvoted further.
There is no reason to assume this downvote comes from a "competitor", and I couldn't find any other downvotes on your answers.