In theory user behavior to serve you ads you want to see for stuff you might be interested in is a feature. The problem comes because the same technology to power that can also power the—much more lucrative—industry of serving ads that are optimally designed to fry your brain and scam you. And then on top of that, it creates a business incentive for you to use a lot of psychological tricks and dark patterns to foster increasingly addictive and anti-social behavior to keep people stuck in a feedback loop of doomscrolling.