Democracies once upon a time, in theory atleast, were for the people, by the people, off the people.
Post advertising funded internet/24*7 news we just have a system for propping up attention cravers, by the attention merchenants, off everyone elses attention and resources.
After creating such an environment do you really believe any of the issues you point out become easier to solve?
Fuckerberg is going to go down as the guy who turned the info age into the age of reactions and noise. Nothing else.