ITT people don't define detail in their opinions.
Shit is more of a end result defining term.
An anime can have no substance, but be entertaining for whatever reason, and thus good.
An anime can be serious as hell, intricate and realistic as hell, but lack in entertainment, it can still be good for it's positive points.
Nanoha got example, substanceless, drilled morales and friendship speeches, huge pink death beams of glory = entertaining, thus it was good.
Even if you yourself were dissatisfied, that is simply opinion and not a way to overall judge a series on it's pitfalls and merits.