At this point Robbie needs Barbie to be smash hit because she is starting to show she doesn't have much appeal at box office being part of two of the biggest bombs in recent memory
She needs a new agent and to stop taking "the crazy girl" roles. I'm personally bored by it and she basically has "go away heat". For anyone not familiar it's in wrestling when someone gets boo'd not because they dislike you, but because they don't want to see you.
It's not just me, as you said, she's had some flops lately.
She was an "It Girl" around 7-8 years ago and Hollywood has moved onto other people in that role.
I think what also played against this movie was people are sick of that era, sick of "Insider Hollywood", and sick of Brad Pitt is "big budget Brad" and Margot Robbie.
This movie also looks like it was made just to try and win Oscars. A bore.
Most of the 2023 films look like crap already (Plane? Are you kidding me....)
Hollywood needs some of those feelgood 80s style comedies or action flicks that are not Marvel and not winking and memeing at the audience every five minutes.