Simple: We need to acknowledge that the vision of a decentralized internet as it was implemented was a complete failure, is dying, and will probably never return.
Robots went out of control, whether malicious or the AI scrapers or the Clearview surveillance kind; users learned to not trust random websites; SEO spam ruined search, the only thing that made a decentralized internet navigable; nation state attacks became a common occurrence; people prefer a few websites that do everything (Facebook becoming an eBay competitor). Even if it were possible to set rules banning Clearview or AI training, no nation outside of your own will follow them; an issue which even becomes a national security problem (are you sure, Taiwan, that China hasn't profiled everyone on your social media platforms by now?)
There is no solution. The dream itself was not sustainable. The only solution is either a global moratorium of understanding which everyone respectfully follows (wishful thinking, never happening); or splinternetting into national internets with different rules and strong firewalls (which is a deal with the devil, and still admitting the vision failed).