Well the ending to Bird Box is they're more or less in a safety sanctuary. They haven't defeated evil, but that isn't something they can do.
As far as these types of movies go this wasn't a bad one. It is reminiscent of A Quiet Place, but A quiet Place is more or less reminiscent of It comes at Night. This is a little more The Darkest Hour, or Vanishing on 7th Street.
As far as the bad guys in the movie goes. It is probably what Lil Rel is talking about. Some sort of Rapture. This also reminded me of the Remaining.
So the recommendation list is:
It Comes at Night (Joel Edgerton) - Something has happened to the world, People must remain indoors and not make much noise.
The Darkest Hour (Emile Hirsch) - Something has happened and People Disintegrate once noticed by a mysterious adversary, possibly alien in origin.
The Remaining (Italia Ricci) - The Rapture has happened. Everyone died except a few remaining people.
This is the End - A Rapture Comedy.
Vanishing on 7th Street. (John Leguizamo, Thandie Newton, Hayden Christenson) - Something has happened and the world is overwhelmed by darkness.
Pitch Black (Vin Diesel, Keith David) A commercial transport ship and its crew are marooned on a planet full of bloodthirsty creatures that only come out to feast at night. But then, they learn that a month-long eclipse is about to occur.
Blindness (Julianne Moore, Danny Glover) - Something has happened and most people went blind.
The Day of the Triffids (1962) - After mass viewing of a celestial event the majority of the worlds population has gone blind. To complicate matters a species of plant monsters has awakened and infested the world. It's up to the one guy who had eye surgery the night before to save the world.
Raiders of the Lost Ark (Harrison Ford, Keren Allen, John Rhys Davies, Alfred Molina) - Don't look over at the Ark of the covenant once it's been opened. Having re-watched this recently it made me appreciate the angle of the movie.
The Happening (Mark Wahlburg, Zooey Deschanel, John Leguizamo) - Something has happened and all the people in the world are commiting suicide when they come in contact with something er other.
Night of the Comet - I can't recommend this movie more. It is exactly what I look for in a movie.