Alternative DNS roots exist [1] but they're not going to receive widespread adoption as the current system is deeply ingrained into how the Internet works, and works well enough. Even if it was massively flawed, people would still be unlikely to change to something new in a timely manner due to network effect - just look at the poor adoption rate of IPv6 despite IPv4's inadequacies. Or our continued reliance on SMTP with all its problems.

[1] https://en.wikipedia.org/wiki/Alternative_DNS_root