Understandably, but blaming other counties only simplifies a complex situation. Ireland was under British control for centuries. Even up to the 20th century, they imposed trade barriers & high tariffs. The Irish economy was awful in the 1980s, but was able to recover in the 1990s, due to government policies that benefited the country & the shift to a different-focused economy.

The best biggest factor to blame is current government corruption and the leaders those poor citizens have to lean on.