Id say it’s more nuanced. The game is theirs? Some might say they stole their work… But the game is theirs and they never contracted or even gave permission for the work to be completed? I’d say it’s unethical still since they have the resources to accomplish this on their own.
I have never liked Rokus interface… I prefer android TV. Most people don’t realize there is an app only mode on android TV that is exactly that, just apps in a drawer. No ads, no fuss. I also like that there is much easier side loading on Android TV.