Eradicating Samba TV from my Sony Android TV was quite a fight. I ended up with a local Pi-hole server blocking everything the TV was trying to access except Netflix. Not optimal but better than nothing...
A Pi-hole is the only real solution for this as far as I can tell if you still want to use apps on your TV like Netflix. I use a Pi-hole as well with several block list sources, my favorite being Steven Black's hosts: https://github.com/StevenBlack/hosts