I have no regret even for a day leaving Nepal. It's not that I don't love my country but people are just pathetic and corruption everywhere. Worked there for a few years and was never happy. To me, culture, family etc are important but able to provide a safe environment to my descendant is more important.
It all depends on person to person and their needs. I don't blame or support anyone leaving the US for Nepal because each of us living our own life and has unique needs. So just try to be happy wherever you are.