I fail to see how this is a problem. Much less one that necessitates spending billions of dollars developing sorting and recommendation algorithms to solve.
Unless your priority is not "show the user what they have explicitly requested to see".
Users were perfectly happy when twitter, Facebook, tumblr, MySpace, and literally every other site was a reverse chronological feed. Now that they aren't, we have federated social media with no algorithm, just reverse chronological. People are perfectly happy with it now, same as always.
If you follow too many people to keep up with, the problem is that you follow too many people. Users will self regulate. If you give them filtering and sorting tools, they'll use them.
It's crazy that we keep reinventing the same solutions and wonder why heaping additional complexity on top of the original idea does nothing but make it worse. You'd figure that someone somewhere would be at least aware of what came before, but apparently not.
We're just gonna keep inventing wheels, and keep touting how many more edges this new wheel has compared to the last one until we get back to round and wonder where it all went wrong.