I bought a Sony TV a couple years back to update and while it does have the Smart TV shit, it hasn't been very intrusive. I updated it when I got it and it's been offline ever since(turned off the online stuff on TV AND blocked it on the router in case it just randomly decided to connect itself again, who knows with this shit). There's a splash screen with a bunch of apps and all that crap if I got to the Home menu, but it doesn't default to that when I turn it on so haven't seen it since the update(or well I think I sat on the remote and hit the button once but yeah). Only thing I use my TV for is my PS5 and an Intel NUC to play videos with, shit's pretty nice, relatively cheap and it's still a "proper" PC so I didn't have to change my habits when I switched and it's good enough to play 4K movies on VLC which is basically all I cared about.
Granted I'm EU so not sure if we have laws that prevent manufacturers from fucking us as bad as in the US though or if it's just Sony being less dickheads about it. It sucks it has devolved into this situation where you have to look into whether the products you buy will have unnecessary shit tacked on you can't turn off. Upside is unless it just dies on me, I'll probably keep this one for a while. My previous TV was like 18years old, I only changed it cause it was getting really old, wasn't 4k and the aspect ratio wasn't even standard shit so I had parts of the screen cut off in games and stuff which was dumb.