JHINE:
There could be a few reasons for a downvote:
It could be a fat-fingered mistake or a person could disagree with some of your post OR all of your post.. It doesn’t necessarily mean anything you said was wrong or untrue.. They just don’t like it. Some people on the forum (maybe lurking JWs) are upset that a particular thing is even said in the first place.
Sometimes maybe some don’t want to engage with argumentative people and they downvote instead.