I don’t run into this because I never allow the TV to connect to the internet.
I basically use it as a dumb screen with a set of speakers and a bunch of devices connected to it: Apple TV, consoles, etc.
As such, when I do use the TV remote - if I need to manually change sources, adjust picture settings, or whatever - the TV’s UI remains responsive.
I have heard that some brands of TV will try to stealth connect to open hotspots to download updates and whathaveyou, but haven’t run into that issue with LG or, in more recent years, Hisense.
This is always the top reply and it's not particularly useful. I want the ease and convenience of having a single device both play and display content, there's no reason that should be so hard. Of course I know I could Buy More Things but that sucks as a suggestion.
This is how most people use their TVs these days (despite the issues with it). It's reasonable and fair to ask for a better experience.