I've never liked the word downvote as it sounds like you are taking value away from a post, something that has already been earned. I have always looked at the up and down votes as a way to reach consensus on the value of the post with polls open for one week and then the final tally is done. I think the mechanism is quite ingenious but unfortunately, it isn't working that way. Maybe because of a feeling of entitlement or that the mechanism is not advertised correctly. I don't have the answer but I think if there was a way to show that positive and negative votes were part of the game it may help sell things better. Possibly allowing the post to be adjusted either up or down based on a voter's stake in an anonymous way could be something looked into. As I said I don't have the answer but I will finish by saying that words matter and downvoting sounds quite negative and something I rarely use except when I see obvious shenanigans.