You're not alone, many feedback I heard is that it wasn't "big" enough - but also, that's sort of Lamar's style. This is the guy that preformed at SNL on an empty stage with only a microphone and white lights.
You didn't like the image of the American flag walking down stairs while he sang sit down, be humble? Most of the rest of the world found it pretty apt.
I think many didn't understand the meanings he was looking to convey.
Even one as simple as Samuel L Jackson representing the white gaze and reprising his role as house n***** from Django Unchained.
The guy is a Pulitzer prize winner. This wasn't going to be all glam.