Good question, something like the grass is always greener on the other side? I don't think this is typical Dutch.
Many good arguments are already posted, esp those from OptimusPrime1980.
Seriously, there's too much wrong with this country; too many people, no pure nature, mannish woman, the mentality, our right-wing government, the color orange, our stupid language, and the list goes on...
Prosperity for most, the weakest are better of than almost everywhere in the world, a great cultural heritage (Rembrandt, Van Gogh, Appel), highest life expectancy, little corruption compared, one of the best soccer teams, many people but not that much pollution no more (in comparison), government is still left wing compared to US, still liberal attitude towards drugs, abortion, gays, etc., Golden Earring, relatively good state finances compared, nice cities for tourists, diversity in landscape and culture, still innovative in ICT, number one in water management, a popular country abroad (yes), the waddenzee (unique)...
When you're strong and healthy you can achieve more abroad I guess, I've been there, but I'm back now and I have no regrets. And freespirit is een chagrijnige azijn pisser.
Says Dr Dutch (and medical facilities are the best in the world, according to the world)
