Not so much a bad experience as one of disappointment. In 1971 I moved with my family from Sydney, Australia, to Auckland, New Zealand. The first thing that struck me was the country lagged behind Australia by a good ten to fifteen years. I recall mentioning to an prospective employer that people in Australia (in my field, radio telecommunications) were beginning to use Ferranti computers.
"What's that?" From an electrical engineer.
"Well, you can type and watch what you're typing coming up on the screen in front of you."
"Bull shit! How can that happen..."
I rest my case on being behind the times.
The other thing which disappointed was the weather. I was used to Aussie summers. The hottest day we had in the best part of three years was 25 degrees Celcius. I used to love going to the beach to swim. Not much chance of that in NZ.
Also, income tax was extremely high, the harder you worked, the more you payed.
But I guess the clincher was the feeling of being "at the end of the world" and right out of what was going on. The Kiwis (New Zealanders) seemed to have a big inferiority complex. Great people, but eventually I knew I had to come back to Australia, if only to know that here I had three million square miles of land mass, with the freedom to travel anywhere in it, rather than the smaller area of N.Z. It's a beautiful country, but lack the versatility of Australia.