The actual research is found on pages 197-198 of this study from the University of Kansas.

Official research states that Asian women are much more likely to attack and demean the physical appearance of Asian men – yet produce Asian looking male children. Asian men married to white women rarely attacked the appearance of Asian women, only largely complimenting the “open spirited” and “kind” nature of White women.

In contrast to the women who frequently alluded to the nerdy quali- ties of Asian males as reasons for these men’s undesirability, interracially married Asian American men in my study rarely mentioned explicitly the physical shortcomings of Asian females as reasons for not marrying or dating them.

However,

However, men who grew up finding non-Asian women, especially white ethnic women, more desirable did tend to elevate white females as paragons of ideal femininity in terms of physical appearance, and even personality and character. One interesting quality that rendered…

Asian American women less desirable, mentioned most frequently by Chinese American men in the study, is that Asian women reminded them of their mothers or sisters, being “overbearing and possessive.”

One man, Matt, explicitly contrasted his “easygoing” and “sunny” white American wife with Chinese American women he dated, presenting his wife as ev- erything they were not. Even though Matt did not talk of Asian women in a negative way in any general terms, his comparison implicitly placed Asian women and white women in two contrasting and separate categories: Asian women as accomplished and smart but possessive and emasculating, and white women as more free-spirited, progressive, and somehow more “evolved” in their dealings with men.21

So essentially WMAF Hapas are stuck with two parents who attack the Asian male appearance (their sons), and also a controlling Tiger Mom. One-two-punch.

Keep in mind, many Hapas look like this.