Why has no one mentioned Projectivy?
It’s a regular app, doesn’t require root (though it benefits from it). It’s free unless you want complicated parental controls (I pay for it but otherwise have no relation to it).
I have a Bravia TV, and with it I no longer have ads, I can change exactly what apps show up, including hiding Sony apps, and can totally customize the whole window.
Finding it was a huge relief for me, as there’s no point setting up parental controls for a small child when ads showing horror products show up anyway.
Hope that helps.
You aren’t wrong, that’s all true. But also there are a lot of reasons to want to “free your TV”. The literal answer is that rooting your TV is difficult or impossible depending on the brand, and the technically true answer is that you can at least get away from the horrible manipulative interface pushed on you by the manufacturer without doing anything difficult. Better than nothing, IMO.