Don't understand the high ratings

Rating: 2/10 (7 April 2018)

There is so much wrong with this film. Monsters appear with no explanation. Fine. Most of the action takes place one and a half years after the "invasion". Fine. The fields around the house are filled with growing corn. Really? The monsters kill by locating sound. So how were these fields planted. There is no problem with energy, ie., the lights are on. What happened to the military. Did they all succumb? Really? At the end of the movie the heroine kills one of the monsters with a shotgun! Are you kidding? That's all it took? But the military didn't have the weapons to take care of this? Piece of crap movie. Save your money.