Without challenging the veracity of your statements (which sound implausible if you narrow it down to working age population not in education and working a full-time permanent job), so what?

There is no rule that life should only suck for a minority of people and that most people are happy. It may well be that the 90% of people earning <60k EUR live generally miserable lives, and for the top 10%, "the EU is number one" and they post about it on Hacker News.