My domains are in AWS Route53, and I did not want to pay premium Uptime of the UniFi Devices. It still needs to be a DHCP client to route properly but you do not care if it never, ever, gets a response from Comcast DNS servers again and you certainly do not want it to tell your systems to use 75. There are a ton of possibilities if you care about security. Discussion about Unifi home network WiFi slow. 0 or Alarm Login to UniFi Control Panel and click Settings.
Upgrading to higher Unifi plan doesn't solve the problem, because it is the gateway to China that is slow.