It's indeed all subjective and downvotes are not meant to be anything other than the opposite of an upvote where token holders express their opinion on what deserves more attention versus less.

It doesn't have to be trolling or negative. For instance, when @knircky just gave a full downvote to my comment I'm sure it mostly reflects his desire to see criticism of the fork get more attention and rewards, and thus downvote anything else above it that he disagrees with. That is fine, and how the curation system is intended to work.

I don't know if he's aware of the fact that I completely agree with his concerns though, and that my positive comment was not there to speak in favor of the fork, but rather to state that regardless of it we need more stake being used to vote good content and retain users, and that the changed rules whether you like them or hate them is a chance to reset bad habits and try to do things better.