Then don’t buy an Android tv?

The problem with 'well just don't buy it' is that in many product categories, enshittification has become so entrenched that there are no longer options to avoid it. The availablity of product features is driven by market forces, if it's no longer profitable to sell a TV that doesn't require online connectivity for the purposes of ads, then such TVs will no longer be sold.

Alternatives like using monitors designed for digital signage come with drawbacks. Expense, they don't have desirable features like VRR, HDR or high refresh rates, since they aren't needed for those use cases. Older TV models will break and supply will dry up.

In the long term, this problem, not just TVs but the commercial exploitation of user data across virtually all electronic devices sold, isn't something that can be solved with a boycott, or by consumers buying more selectively. The practice needs to be killed with legislation.