I just recently started using my Samsung TVs as dumb screens because they're slow as shit, but a nice side effect is zero ads.
ONN 4k streaming box for $20 at Walmart.
Install a custom launcher.
Install a button remapper for the remote.
Install SmartTubeNext for YouTube (no ads, SponsorBlock).
Install whatever other apps you need (Plex, etc).
FAR better experience. Turn the TV on and it's ready to go in a few seconds, not the ~60-90 seconds it takes the Tizen nonsense to "warm up."
It's not perfect, but it's a hell of a lot better. Can recommend, especially for only $20.