A cheap computer/laptop. HDMI cable. Ublock origin (sprinkle some sponserblock and privacy badger in there). A TV that is never connected to the internet. Voila. No ads. None. Zilch. Zero. Ad free.
Streaming platforms that have gone to ad supported formats make me laugh because it's just a 3-5 second black screen, not the ad, and it's back to the content. Been doing it for decades. Don't sit there and get reamed by their bullshit.
Buy a smart TV box like Apple TV or Nvidia Shield. You can get full quality streaming with some ads but not nearly as bad as the software that’s built into some of these TVs.
Don't buy a TV anymore. Seriously though with the direction things have been going in the "tech world" for the last couple years (maybe even decade) it is probably better to start adjusting to some level of digital minimalism. For some of us it will become a necessity for financial reasons anyway...
Detailed instructions for things like this will need to documented. It starts with ads… does it evolve into 1984? Who knows, but it seems more likely in light of recent events.