You do know most people bought the Note8 because it's actually a really convenient phone right and not just some show-off piece of glass & metal?
(With it's signature S-Pen, "big" display and primarily office /usability focus).
You're definitely in the wrong if you think buying the latest and greatest from a big company equals getting fast updates.
Surely Samsung could bust updates every 2 days to ensure People like you don't get on their nerves, but it's just that irrelevant to them and the vast majority.
Seriously, as long as you get your security patches, you're good to go IF you're one of those super concerned people.