I can see how that would be true in some cases.
If they didn't learn enough about their destination beforehand or are unable to adjust to language barriers quickly enough.

I was lucky in that way - I only went from one English-speaking country to another (though I would love to give myself the education that only an immersion language situation can give you!) Still, there were many words which I needed to change in my vocabulary, prejudice from people who didn't like 1. Americans 2. immigrants in general - despite the fact I moved in with a husband and child.

I had to find new answers to old problems (which is the best laundry soap to use? or where the heck do they keep buttermilk?)

Most importantly, I had to be willing to ask the "stupid questions" in order to learn. :-)

Following you so we can chat more about our experiences being an expat.