I sometimes feel the same, that I'm qualified more than many people, yet I'm stuck with a job that doesn't pay well and I don't enjoy, while others have better jobs and lives. The only reason I can think of is that because they are more sociable and have a wider network of people. I'm not sure if the same thing might apply to you. People tend to underestimate people who aren't very sociable, and overestimate the sociable.