For anyone that has a capable router, an rpi or any kind of home server, I can highly recommend https://github.com/DNSCrypt/dnscrypt-proxy

It lets you send encrypted DNS queries out onto the Internet to any service that supports it (there are many, and you can configure it to use multiple for redundancy), while serving "normal" DNS in your internal network.

It's also trivial to import a blocklist of domains with cron, from hagezi/dns-blocklists for example.

If you have no interest in setting something like this up, at least ensure that you have manually configured or are pushing _multiple_ DNS servers via DHCP. It sucks that 1.1.1.1 went down but it shouldn't matter, there's a reason every operating system supports configuring multiple DNS servers.

For anyone in the EU I can recommend https://www.dns0.eu/ or Mullvad, but at the very least if you're using Cloudflare and don't care about privacy, set 8.8.8.8 as your secondary DNS.