Along with the oversaturation issue, I think The Marvels is paying for the sins of other MCU movies that disappointed people and yes Captain Marvel itself too. Captain Marvel because despite their attempts at a character arc, attempts that I'd argue failed, I don't believe that people latched onto Carol like they did Black Widow. I'm not even a huge fan of Scarlett Johansson but I believe she lended that character a likability and vulnerability that Captain Marvel just doesn't have.