LG sucks in many ways. I have a cx as well. I rooted it and blocked updates and all lg services, which helps a lot

If you update it though lg automatically and silently opts you in to data sharing without your explicit consent, which is bullshit and disgusting, but you can turn this of by unchecking a box in settings, which is easy enough. Although given how they handled it I don’t necessarily trust them to honor the opt out and thus traffic from the tv has to be to whitelisted servers (I don’t use any webos apps aside from ad free youtube app)

That said imo compared to all the other smart tv options webos is one of the best options. Especially if it’s rooted (though rooting it is becoming much more difficult these days). Then you can install adfree youtube with sponsorblock, permanently block updates, etc.

Android tv is absolute garbage and loaded with more ads than anything. But at least android doesn’t break when you use adblocking; my old Roku tv doesn’t allow you to set custom dns servers and when you set an ad blocking dns server at a router level the TVs apps break. Android still works although googles ad game is so strong that even blocking all their ad networks still allows some ads somehow, even deleting caches. I’m pretty sure android tv just has ads installed in it

Of course the best thing to do is never ever ever connect your smart tv to the internet at all and buy a secondary device to utilize for watching media. I recommend ugoos devices. I use the am6b+ but they have other/newer devices that may fit your use case better. Stripped down android with 0 ads but can still run all streaming apps/dolby vision licensed and you can flash them with Coreelec so they natively boot to kodi