Well done @ura-soul you have really said a lot.

The idea of Proof of Brain is that the community subjectively values ideas so that the subjectively 'best' ideas are rewarded. So the posts at the top of trending are theoretically those which the community's stake holders most value.

I believe that if a post didn't interest a curator in a way he/she deems fit, the best way is to avoid such post entirely instead of downvoting it because you disagree or dislike it.
Even though upvote and downvoting exists as a way to balance the activities here on hive I still think we should do that in a reasonable way and not to abuse such previleges.

Talking of the fact that trending post are posts which community stakeholders value more, there are many contents which do not even worth the curation it's getting and there are others that worth it but is not valued - I think something is missing here and we all need to address it.