While I agree that "toxic positivity" is a strange phrase, I think it has it's place here. There's been a movement in the "wellness" world to coerce people into believing that, as long as we see everything with "love and light," it will all be OK. You don't have to be a psychologist to see how this viewpoint has spread to the point of dangerousness, leading people to avoid taking a life-saving vaccine that can, not only, save their lives, but keep this virus from mutating to stronger and more contagious strains. But, I am a psychologist and I see the damage it does to make believe that painful events did not happen or that we just to have be positive. Positive psychology is not about ignoring pain, but finding our way out of it. And that involves first acknowledging the pain and validating it.

p.s. Toxic positivity could have led Simone Biles to push through her own feeling that her mind was not where it should be in order to perform dangerous stunts safely. She calls it a mental health issue that stopped her from competing. I see it as a mental health win, as it was mentally healthy of her to make the decision to take care of herself and not risk life-threatening injury for the sake of the expectations of others. She didn't "push through it" with toxic positivity. She is now truly a hero (she-ro).