So yeah... Halo 4 is probably pretty good. If you disagree, you're probably wrong because you haven't played. When you have, you are totally entitled to say whatever you want.
I'll admit I was incredibly skeptical. I've hated pretty much everything Halo-related for years. When I played it at E3, though, I was blown away. Its Metroid influences are very clear and that gave me a lot of hope.