Ah okay I see. I don't actually have a problem with the concept of a global trending. But more filters and search functions are much needed.
In terms of traditional media, it's funny because botting and shady engagement services try to optimize the metric that would grant access to exposure, but it seems to be difficult enough that it isn't causing major problems (or there are systems in place to look for it perhaps). So the actual platform provided promotion service is used, and clearly marked as such.
On steemit we only have the the former kind (okay fine promoted was the attempt at the latter and... Yeah we all know that's a joke), and it clearly just looks shady, even if that isn't the intent. Like you say, it all blends together. And only a platform change will help with that.
Bid bots are a promotion hack that have the intended promotion effect, but there are so many downsides (to be written... Bleh). I think someone needs to drive the way to a healthier ecosystem.
(And I don't think communities will solve all the problems)