Note that your original comment is not downvoted anymore. That's the best reason not to complain about downvotes; usually it will be reversed soon enough if the comment has merit.

Early downvotes can happen through accident or randomness; all it takes is one or two people to misread your comment, or mistakenly tap the down arrow. Or they might have a valid reason for disagreeing and are in the process of writing a comment putting a different point of view.

But getting offended and defensive and editing your comment to complain about it only makes the original comment worse, and leads to an off-topic subthread like this.

Sure, edit the comment if you need to, but try to make it clearer and more informative; that's what I do if I get an early downvote and realise the comment could have been better-worded.