Yeah, same here.
In light of a grandchild comment to this one about notification center on iPhone, I'll offer that on Mac you can do a two-finger swipe from the right side of the touch pad to get notification center. It doesn't have search, but they are grouped in stacks chronologically. There is no default hotkey, but you can set one in system settings.
Or click the clock.
> I don't understand what I'm supposed to do to make it behave in a way that makes sense.
There used to be an actual icon for it to the right of the clock. Why would someone think to click on the clock to access their notifications? This apparently also led to the clock becoming mandatory instead of being able to hide it if you wanted to use different options.