Take my alcoholic girlfriend... please.
Colossal begins as a variation on the musty Henny Youngman line, crossed with a self-consciously wacky riff on the genre known in Japanese as daikaiju ("big strange beast"). But the premise can't sustain a nearly two-hour movie, so writer-director Nacho Vigalondo adds more twists, designed not only to keep the plot moving but also to partly exonerate Gloria, its heroine.
Gloria is fundamentally nice. (She has to be; she's played by Anne Hathaway, who rarely does mean.) But when she acts out, she really acts out.