Bird Box is simply overrated and falsely promoted by Netflix saying it's best horror movie and blah blah.. Believe me, it's nothing like that, it's a simple thriller with some twist and turns which follows the almost same plot of 'A Quite Place'. Both have many similarities.
I read in an article that the ending of movie is so scary but the truth is it's simple straightforward like many other movies out there. Not a waste of time but still doesn't stand up to the expectations.