I liked the premise of them weaponizing that smile though. It's not just her smiling to mask her pain, it's formed into a "physical" being that warps her perceptions and affects her entire life, as well as the people around her. Her smile only brings forth her buried guilt/trauma and it affects her mental health, which in turn affects her relationships.

I think buried deep down it has a solid premise (albeit not fully unique), but it gets way overshadowed by the amount of jump scares. There's the people who are too scared to finish, the ones who brace for scares more than paying attention to the story, or those who are unaffected and think the scares make the movie more cheap. Without so many, I think they could've made a solid psychological horror.