It seems to have a big impact that the default DNS of Cloudflare WARP, a free VPN application, is 1.1.1.1.

There seem to be countless choices of DNS services, from big names like Google DNS, NextDNS and Adguard DNS to personal hobby projects, but in reality there are surprisingly few DNS services that are reliable enough for regular use.

You can always host your own instance: https://www.icann.org/root-server-system-en

Yes, but in that case .com, .net, and .name would all still be censorable.

I don't know what you want.

A domain that isn't fragile enough that one company can take it down. Systems like namecoin or ens don't suffer from this problem because they are actually decentralized.

You have to host somewhere ... and that is usually owned by, you guessed it, one company. There's always a single point of failure, whether it is your power company, yourself (you will die one day, or get injured, or sick)... there are so many failure modes.

It is infinitely more likely wherever you are hosting your domain to shut you down vs. DNS.

Systems like Namecoin and ENS suffer from accessibility though because major browsers haven't adopted support for .bit or .eth domains.

You aren't wrong. Most people don't care about decentralization so browsers don't prioritize it either.