That's where something like pihole or other systems comes in handy. I've got 2 at home for redundancy, and they're pointing to Quad9 for IPv4 and 6 while also blocking ads.
I would also look into eBlockerOS for a RPi, it's newer, should be just as good, supposed to be more customizable. I'm testing 2 different ones at work for fun, eBlocker is one of them. See my list below of DNS systems that can utilize Quad9 as the resolver while implementing adblock
DNS sinkhole apps: