In certain degree, I am a loser..

I came to the US ten years ago. Gave up my career in architectural design (I had my own small firm back then) and spent two years getting my MBA degree from a 2nd tier college. Working as an accounting manager for eight years and making $100K/yr in east coast. Sounds Ok, right? Well, the thing is that I missed the biggest construction and economic boom that's been going on in China for years. Some of classmates and co-workers back in China have become very successful either doing architectural design and real estate development. What do I have? A f*cking boring job, a dickhead boss who does nothing but bullsh*tting. I can't stop thinking where I would be if I stay in China. I would have been much happier doing what I love to do and staying close to my parents and friends. The reality is that my so called "American dream" is a total failure.