Many people suggest buying a dumb tv and then an apple tv. The problem is, now I have two devices and instead of trusting [TV manufacturer] I have to trust Apple. I don't see a big gain in it and also don't consider Apple to be especially trustworthy. [TV manufacturer] should just sell me a smart tv without customer hostile "features".
Your TV manufacturer does.
Apples shareholders will one day be keen to achieve the second trillion dollars on the company's valuation.
I have a random, no-name Android TV box and it's one of the best value for money devices I've gotten in years - covers every single streaming service, has IPTV, web browser, and any other conceivable option you'd want in a TV box. You can add a VPN trivially, use it as a music client for LMS....and so on. Plus it doesn't have unblockable ads covering half the screen like recent Samsung TVs.
Unfortunately there are basically zero TV manufacturers who will do this.
The price will be much higher then. Right now, you're sold the tv at a discount (at a loss, I'm pretty sure) because the manufacturer will make money off you down the road by stealing and selling your data to advertisers. It's kind of like with social media (though to a lesser degree) - don't make the mistake of thinking of yourself exclusively as a customer. You're a product, too. Their advertising partners are the true customers.
[1] https://www.statista.com/statistics/234056/facebooks-average...