If the monopolist chef is deliberately adding addictive ingredients that causes health problems, I think, yes, they're the ones to punish or address the problem with.
> addictive ingredients that causes health problems
Like sugar? Are we going to make candy illegal now? Through the court system, retroactively, with no legislative mandate?
There's no law saying social media has to be a "sweet and nice place to be", and that was never the goal. They want to make it an interesting place to be so you keep coming back, and there's no law against that. Trying to create one ex post facto via the court system is a really dumb idea.