Anyway - leaving that slight thread jack behind, I thought I might say a little bit on the subject at hand.
Bad writing, I think, is writing that interferes with itself. When the point of the story is to show the greatness of Empire A, and all I see in the film is Empire A acting idiotically and everyone around them just constantly reaffirming their greatness anyway, that's bad writing.
When the point of the story is to show the ridiculous absurdity of event b, but nothing in the story actually gets anywhere near being funny or absurd, that's bad writing.
There is also, of course, the possibility of slightly less bad writing, which sort of occasionally interferes with itself in more minor points, without ruining the main point of the story.