I bought a Vizio smart TV in 2021 and repaired it myself recently. I chose this brand in part because Vizio had fairly unobtrusive ad bullshit on their models (only showing ads for media on various streaming services when on the home screen), in part because I tested out the "smart" UI at a Best Buy and found it tolerable, and in part because it was on sale at the time.
Tonight I disconnected it from the network and ran it through a factory reset. I skipped the wifi connection, skipped all the EULAs, and now I have a TV that will still accept HDMI inputs and OTA broadcasts but which I will never connect to the internet again, because Walmart has bought Vizio and god only fucking knows what they're going to add in future firmware updates. It's got my gaming PC hooked up to it and that's how it's going to play movie files and stream video and do everything else now. Maybe eventually I'll get another Apple TV to hook up to it since Apple's business model isn't about advertising, but for right now this will do.
If you have a Vizio smart TV, I would recommend you disconnect it from your network and connect a PC or an Apple TV or something else to it instead, because Walmart wants your eyeballs and you shouldn't give them the opportunity. This is going to turn millions of devices into early e-waste as these devices are going to get absolutely flooded with ads.