That is my problem. What can you trust anymore? Is there an appliance out there that can do the basics and not be a malware gateway?
You could give it a vpn to a public cloud provider so that even if they run residential proxies they still get a dirty vps IP.
Admittedly this doesn't stop the presumed screenshotting and microphone use and worse
Smart TVs replaced dumb TVs not out of consumer demand, but out of subsidy from commercial databrokers and streaming services. Despite adding $100 of hardware they were priced $100 cheaper.