At my house, we love our Roku devices. Pair a nice quality OLED panel (never, ever connected to the internet) with a $50 Roku stick and you're good to go. The Roku UI has been consistent, fast, and clean for 10 years now. Roku's updates somehow haven't enshittified the experience like so many other platforms do. They did introduce video ads on the home screen a few years ago, but also provided an option to disable them in the accessibility menu. We do see a static ad on the home screen but we find it tolerable for the 10 seconds it's on the screen before we open up one of our streaming apps. My only gripe is that sometimes the ads are for R-rated shows and can be not kid-friendly or provocative.
I think the main issue people have with Roku is that it also does pretty extensive tracking of you, what you watch (ACR), what devices on your network, in some cases, what you say and so on.
And they shared this collected data with a bunch of third-parties.
In other words, they do the same stuff that OLED panel that you recommended never, ever be connected to the Internet does.
But don't take my word for it:
https://docs.roku.com/published/userprivacypolicy