Final answer:
The key reason for expatriate dissatisfaction often stems from a range of issues including limited career advancement opportunities, unsupportive work environments, work overload, feelings of isolation, and struggles with cultural reintegration upon return home.
Step-by-step explanation:
The single most important reason for expatriate dissatisfaction is likely a combination of factors that contribute to a disconnection from their home culture and a struggle to adapt to the new environment. Among these factors, few opportunities for advancement, unsupportive supervisors, work overload, and lack of perceived control can all play significant roles in fueling expatriate discontent. Additionally, the emotional challenges associated with being separated from familiar social networks and being exposed to potentially abusive or exploitative work conditions can exacerbate feelings of alienation. Experiencing a sense of xenophobia, or feeling that one's contributions are not fully appreciated, can further contribute to a sense of isolation and dissatisfaction. Furthermore, the impact of globalization on their career prospects and personal lives may lead some expatriates to question their decisions to migrate, particularly if they face difficult conditions and limited life alternatives upon return to their native countries.