I don't think that's very obvious, I'd argue that the drop off was mainly because of overwhelmingly negative media reaction to the film. And I don't mean just the critics, but the way in which the media framed the narrative regarding its release, first there were horrible reviews and it was labeled a failure and "no fun", everyone linked "Sad Affleck" videos, then when it broke opening day records there were articles how its success is actually "deceiving" because it released worldwide, then they all jumped on the giant 80% Friday drop headlines(neglecting to mention that the previous Friday included record breaking Thursday previews), and it's been "this movie isn't making enough money" almost every day since, it was just a constant barrage of "this movie is a failure don't see it" which naturally turned off casual moviegoers.
I'm pretty sure actual word of mouth is what saved it from falling even further.