> Stop their most addictive patterns.

Which are? While it's easy to say things like "oh, infinite scroll is addictive" or "autoplaying videos are addictive", those are only the most obvious ones; (social) media addiction comes in many forms. Old Reddit didn't have infinite scroll and you had to click to open items, but would you argue it wasn't addictive anyways? IRC style chat, news groups and forums didn't have any of the obvious dark addictive patterns we associate with harmful social media nowadays, but we still whiled away the hours on them regardless.

I don't think it'd be as straightforward as banning certain practices. Besides, it'd be a game of whack-a-mole since for every legislation they'll find a way around it, or make it so that the users clamor to bring it back - take the EU privacy directive, it told companies they needed user permissions first. But they - the companies, not the EU or the laws - implemented it in the most obnoxious and harmful way possible to spite their own users and hopefully annoy them so much that they would either just hit accept, or vote the lawmakers out in favor of more economically liberal people.