BuyFromEU

You can use your own home theatre PC with Linux, and use a Bluetooth media remote with a web browser to access streaming services. You can also host your own content and use Jellyfin. Kodi can also be used for a good tv interface. And you can even use it to game, pushing it beyond the media sticks.

I have a beelink miniPC in my living room, and I use it for streaming, web browsing and gaming.

Another cheaper alternative is to use a raspberry PI as a home theatre device. It can be a capable media PC.

The biggest issue with both is 4k content and HDR. Many streaming services dont allow content to be streamed at 4k in linux devices. Also HDR support in linux is lacking - no browsers support it, and its experimental in DEs like KDE and Gnome only so far. If you supply your own content then 4k is no issue, and for HDR if you get an AMD GPU you can play with the experimental features in KDE and Gnome.

If 4k/HDR is a deal breaker then Windows can be used but obviously thats american and brings in a whole host of privacy and security issues of its own.