I have received undue superuser hate (=down-votes). Could you please undownvote it? Thanks
Down votes do not mean hate. If you think they do, you might just take things too personally. If you yourself down vote others' posts because you hate the posts or the users behind them, well, I'm sorry to say that, but then Super User might not be the place for you.
Downvotes generally indicate that a post – in some way – is not a good fit for the site. It might be lacking research effort, it might be unclear, or it might simply be not constructive or off topic.
A question can be undownvoted from the person who downvoted it only after it has been edited. Otherwise, votes stay locked indefinitely. This is basically the only way a downvote could be removed.
One downvote stems from the system, which automatically happens when a question is closed as off topic or not a real question.