[Source NSFW]

Asians are the most feminine of races, the weakest of our species. In isolation, this was enough to build a great, if decadent, civilization: women were kept under a strict hierarchical control, so sexless men could focus on science and culture without worrying about trying to breed. Asian women became hypersexual and extremely submissive, just so they could submit at all to someone as weak as an Asian man.
Unfortunately for your race, the White Man arrived, filled with not only civilized intellect, but the carnivorous hunger for conquest, the sexual drive for domination. Once we globalized the world, your women immediately chose the stronger, aggressive men, and little Asian boys could only watch nervously and peck at their calculators to understand why.
Or maybe it’s because our dicks are bigger