I find this a really arrogant and condescending comment but you know what, it doesn't matter lah. I know my life and my kids' lives will be all the richer for having been able to learn about and immerse in different cultures, and more importantly, it will hopefully teach them about tolerance, and broaden their thinking. I know it certainly did mine, and I feel it all the more when I go back to Australia and catch up with my friends who have lived there all their lives.
You seem like a genuinely sad person, surely if you are that miserable, you are better off going home. Money isn't everything. All the best to you, I hope you will be able to find some sort of happiness while you are here.