The difference between an echo chamber and a filter bubble in my mind is an echo chamber you choose to in with likeminded people, a filter bubble chooses you and you don't really see it.
The traditional media does not have the kind of reporting muscle on the ground that it used to. I was very hopeful that the new digital media operations would pick up that slack, and a lot of them are trying and they're doing creative things. But none of them can scale appropriately to have enough journalistic firepower as well.
Democracy is not being well served as we're accustomed to. There is less information, there's less investigation, there's less analysis, there's less accountability.
Either for profit or for political malevolent reasons, people are polluting the otherwise wonderful democratizing agent called the internet, with all kinds of things that are not trustworthy. And people are confused.