Correct for the most part brother, I'm on Satellite Internet, changing DNS servers "for me" does cripple most of their data collection.This will not particularly help. All traffic you have will pass from their servers. So if you don't use a vpn they will still see the locations you are connecting and when not on ssl even the data you are passing through if they wanted.
Changing dns works only in cases they do dns redirecting for when they block sites in a stupid way. In this case the problem is way worse.
Everyone should grab a vpn and protect themselves if they are worried about their privacy. There are a few vpn out there that are pretty good and they seem to care about user privacy.
Twice I have had service calls for issues, and both times the last thing the Tech did before leaving is put the default Addresses back in.
Of course you know me, before he made it down the driveway it was back on "my" DNS servers
Satellite is a little different. I may go to a VPN later, but I want to watch and wait and see how this plays out.