semi-related: after installing pi-hole and using it on my wifi, Netflix on the TV stopped working, ads on (some, big) polish websites were still present. Uninstalled 10 minutes later. Had similar experience last time I tried (years ago) - pihole gave me problems using work-related pages or whatnot. Is there nothing better? E.g. ublock origin but for dns?
Maybe try a less aggressive blacklist in Pi-hole, or better yet, cancel your Netflix subscription and source your content in the high seas.
Take a look at AdGuard Home. It's functionally similar to pihole but overall better made / easier to use (IMO). I only use the first AdGuard DNS Filter and have only need to allow one domain to unbreak a site, but I also combine it with the browser extension (DNS-level blocking isn't going to remove all ads no matter what you do). You can check the query log to see what's getting blocked.