Unfortunately, there is no way to completely eradicate the banner ads from your Fire TV home screen. It’s Amazon’s tech, after all, so it does reserve the right to advertise whatever it wants wherever it wants to. You can’t alter the default position of your remote cursor either, so if you don’t want to get a face-full of ads the moment you turn your TV on, you need to recall to press either the Home button or the down directional button on your remote. Technically speaking, you could eradicate the ads from your Fire TV home screen by disconnecting it from the internet, but then you obviously wouldn’t be able to use any of its online features or install any new apps.
While you can’t ditch the ads entirely, though, there is a way to make them substantially less intrusive: by altering the settings in your Fire TV’s Preferences menu, you can disable the ad autoplay. You’ll still get a static ad if you don’t immediately proceed the cursor after booting up the TV, but it’ll just be an image with no audio or video.