With my android tv I put the main menu in "Apps Only" mode to cut down on the ads... There is still the main screen ad you cannot avoid but thats it.
Then i sideloaded SmartTube, which is youtube but it skips the ads for you.
I also have a Plex server i stream from.and update by torrenting shows to the server separately when theyre interesting enough. This takes more time and effort but is definitely worth it to have control over your media.
Oh sorry for misunderstanding. Its difficult to fathom watching scheduled programs anymore, but old habits do die hard. Best of luck to you.