The CA system is decentralized by nature. If the existing authorities start trying to manipulate your internet by controlling who they verify, which hasn't really happened that I'm aware of, you can always add a new root certificate. Or consumer browsers can offer new CA roots out of box.
CA chain is centralized. Plus, it requires you to have a domain name. DNS is also centralized (although to a somewhat lesser extent).
Effectively, we're seeing yet another step in hyper-centralization of the web.
also, as above, there is no one root CA. you can add and remove any ca from your system. most users don't because why would you trust a random ca from some random site.
What's the actual problem here?
Note the one you asked, but i have the same issues with the certificate mafia.
Increasingly, I see that the web no longer fulfills any of its original goals. On the other hand, if I look at it as a software delivery/execution platform I see a horrible mess that could have been designed a zillion times better if that was the goal to begin with.