I replaced the TV Box from my ISP as well as the Media Player I already had for local media with a cheap mini-PC running Lubuntu and Kodi and have seen only a handful of adverts on my TV in the last couple of months (which I might see only when I'm watching Live-TV).
(PS: Mind you, there is no way to avoid Product Placement in Movies and TV Series, so I have still probably seen quite a lot of "covert" advertising).
The whole thing is now under my control and hence I don't have to endure that crap.
Granted, I've been a Techie for decades and have for a long time been very aware of how software with Internet access is an agent of the software maker serving their objectives, not of yours serving your interests and how anything you paid for held by somebody else isn't yours until you take them into Court for it and win (so your "bought" movies held in somebody else's system aren't yours) so I never jumped into the Streaming bandwagon and instead kept my eyepatch handy and wooden leg polished, and when I got a TV some years ago - before the enshittification really took off - I very purposefully avoided "smart" ones like the plague.
Frankly even if you're not technically adept just get a Mini-PC and install LibreElec on it (which is purposefully made for non-Technical users to just to use Kodi) and get used to using Kodi. If you're into paying for it you can even subscribe to perfectly legit IPTV subscriptions with hundreds of Live-TV channels and it definitelly integrates with the paid streaming services if you can't do without and don't want to sail the high seas.
(I'm running Lubunto, a more generalistic lightweight Linux distro where I explicitly installed Kodi, rather than LibreElec, because I use it for more things than just watching stuff on my TV).
PPS: Also, get a generic wireless remote of the kind used for Android TV (which works just as well in Kodi under Linux, as all those things do is send key-presses using the same USB protocol as keyboards), not the voice control crap with just a few "app" buttons but the ones which look like normal remotes. They often come with air-mouse functionality and a full mini-keyboard on the back, but one almost never has to use that even with Lubunto which is not really designed to be unobstrucive and will pop-up "update" prompts once in a while (I'm tempted to fix that, just like I fixed the need to explicitly log-in and start Kodi, but so far I can't be arsed because it seldom happens)
