It's a solid album, tbh. But nobody even knows who Marina is in the US. Her promo was pretty much nonexistent. She didn't even try to appeal to her target demo. Her single went no where on the radio.
Performing on Jimmy Kimmel at 1 in the morning does not count as an adequate form of promotion.
How to be a Heartbreaker could smash but she needs to step it up in the promo department, like yesterday.