unhappy at work

I have a friend who had been unhappy at work. He told me that no matter how hard he tried, his boss was completely unreasonable. Ultimately, he was fired. An acquaintance who knows both my friend and his boss told me he feels that it was my friend’s issues that led to his dismissal. So what’s the truth? My guess is that it’s a mixture of the two viewpoints. But here’s one thing we can know without question: Being unhappy in one’s work can lead to some sad results.