The author is right that:
1. Every single website and app regardless of whether it is specifically built for kids or not is covered by this bill, and
2. It is virtually impossible to identify and segment your user base and apply the bill's protections to only those you can 100% confirm are under 18.
So, the likely outcome is that this bill becomes an enhanced CCPA and something businesses have to generally comply with for every user.
Looking at the actual contents of the bill though, my response to that is – great! I do want to be treated like a child online. I want sites to present terms of service in a language I can understand. I want them to set my account's privacy settings to the highest offered by default. I want apps to remove dark patterns that get me to spend money. I don't want them to store my data unless using it to provide a service. I want them to tell me up front if my browsing is being monitored by someone else. I want actual consequences if a company decides to leak all my personal data. (All of these are provisions that will be enforced).
The author is critical of the bill as a whole but I don't see any argument against any of the individual provisions. I also don't get where the "eliminate anonymous web browsing" in the title comes from. If anything it will make it less likely for sites to track you.