If I was in your boat I’d probably do what you’re doing right now, because I hate Roku’s operating system. Long ago my family used this Roku for the same use case:

https://www.amazon.com/Roku-Express-Ditital-Streaming-Player/dp/B07CVH1L53?psc=1

It’s the Roku Roku Express+ 3910RW. Apparently it doesn’t get updates anymore though so your mileage may vary with this thing.

https://community.roku.com/t5/Roku-setup/Roku-Express-With-Composite-Cables/td-p/823748

I ain’t reading all that