My first immigration was euphoric, ecstatic, there was no trauma at all. The second immigration, however, was deeply traumatic. Today I can say that it took me about 10 years to get mostly over the trauma, which is normal for adult immigrants. (Of course, there are those who loudly insist there was no trauma. These are the ones who never got over theirs. Just like those who get divorced.)
The biggest factor in this difference was age. Our psychological problems get more difficult to carry as we get older. (This is, by the way, the reason why many people believe that psychological problems are acquired much later than they actually are.) The trauma of immigration was imperceptible while I was young and my psychological burden was still easy to carry. But as I got older, it got harder to carry these problems without falling down.
Now I’m almost entirely over it and don’t even want to go back to Canada. They have sales tax, their political space is boring, there’s never anything to buy, the field of Hispanic Studies is overrun by a mafia, and – to use a tired old cliché – there are not nearly as many opportunities. The US is a very slowly and laboriously acquired taste but once I did acquire it, I really dig it.