Literally in every Facebook post there is someone saying how their Facebook feed is a mess and how Facebook is "declining." I'm sorry to tell you this, but it's you and the people you are friends with that are the problem. Not Facebook (all of their metrics and revenues are up). Try being friends with more interesting people (or at least mute the bad ones).
That's just one side of story. On the other hand given how much Facebook supposedly knows, it could prioritize better what's shown in the news feed. There are high chances that even these people who are complaining, still have a couple of friends who post interesting stuff.
