Social media.
Obviously not all of it is equal, but there’s certain low-hanging fruit culprits (Facebook and Instagram immediately come to mind). I see far too many people endlessly scrolling IG loops, and apparently many spend an hour+ daily doing so. These applications hijack the brain’s reward pathways and are inherently addicting by design.
Facebook is a trash advertising company with no regard whatsoever for privacy and I’m absolutely stunned that they haven’t imploded yet.