It would be nice if they could prioritize things by letting the user indicate "I want to see more/less of this stuff" and then build the algorithm based on that

It would be nice if they could prioritize things by letting the user indicate "I want to see more/less of this stuff" and then build the algorithm based on that. I bet they did their testing on that and realized that users never end up doing that so they're going to try to come up with their own strategy. I agree with you, my feed has really dropped in quality even after blocking clickbaity sources like BuzzFeed and other content farms.