It's hard work ending up in Europe. You have to be driven, one way or another, to endure that journey.
Refugees are at a disadvantage in terms of employability, capital, and in academic capital, while the European labor market has high unemployment, few low-skilled jobs, and high educational demands on most jobs.
They may be driven, but the deck is stacked against them, which is why we aren't seeing more impressive outcomes for these groups.
By education I don't even mean they're undereducated - for example over 40% of Syrian refugees here in Ireland are college educated, comparable to the overall level nationally. But their educational institutions are unknown here, and not necessarily trusted - and a limited grasp of the language is always going to hold you back. We have a significant shortage of medical staff here but Ukrainian doctors have so far been unable to enter the workforce because it takes about a year to go through exams to verify their qualifications.
Plus asylum seekers in many countries are banned from working at all - hard to have a good economic outcome when you're not allowed to earn an income, sometimes for years.