Promising but disappointing and too much about gender

Obviously the comparison with the masterful Sukkwan Island at the back of the book sets the bar very high, but it also leaves to imply that the story will go wrong.
So it devours the pages, we wait, we wait ... while bathing page after page in gender stereotypes: the little girl in pink pajamas, pink suitcase (it's simple everything is pink) who plays Barbies; the mother who believes that fathers are incapable of raising children, a sailor who told the father that the place of girls at home, in short, everything goes. And after a while it really pollutes reading!
And then on to the end (quickly because it's short) and then disappointment.
One positive? it's well written, ok.
The story could make a great novel, worthy of Sukkwan Island. But the expected result and sold is not there.