So horrifically terrible that words fail me.
But I'll try...
SPOILER ALERT!
Here you have a woman who believes that her life, and the life of her young daughter, are in imminent peril in a remote farmhouse...and she STAYS in the farmhouse! She buys multiple guns for protection...and they are never kept loaded! She is endlessly loading and reloading the guns...even when they have not been fired. She apparently has 2 copies of the exact same double-barreled shotgun, since 1 was confiscated by the police, that have an under barrel mount for a flashlight...a very uncommon combination (I've never seen this). She commonly fires 1 shot at the beings, and then runs away, she never takes a second shot. And 00 buckshot doesn't even slow down these creatures.
She knows that the beings live underground...but never goes down into the cellar until the end of the movie. When she pours the gasoline/kerosene all over the house she makes no effort to actually get it down into the cavern where the creatures live. The creatures have some kind of "tech" to keep people alive in pools of water, despite no educational system or method of procuring equipment - THEY ARE NOT "ALIENS"... they are an indigenous species.
The police suspect child abuse...AND DO NOTHING! When the mother escapes from the police...she returns home and takes a bath! The sheriff is alone in confronting a suspected murderer.
Use this movie for a drinking game...if you never want to get to the end. Otherwise it has no purpose for it's existence.