I wouldn’t lump most Chinese diaspora with HKroaches and TWers. There are a lot of self hating racists, but those tend to be the talentless leeches who lied their way to the west. Most overseas Chinese who are abroad on their own merits tend to be an entirely different breed of animal. Second and third generation is where it tends to go downhill as western brainwashing and peer pressure gets its hooks in youngsters something fierce.
It doesn't absolve the parents of setting up the next generation for failure in this regard. The parents are either extremely unaware given their other merits or more than likely decided to take the tradeoff usually for economic/professional/personal opportunity.