Ukraine is not really a barbaric country. The country has turned barbaric by people who use the country as an instrument of pressure on Russia. They know and knew how to solve the problem of Donbas, how to change the Constitution. There are quite serious lawyers there. But since Ukraine needs to be a country at war, it will not be allowed to do anything of this. It is an object of geopolitics.
Ukrainians thought they would be able to sell their goods quickly to the European Union when they became associated. And nothing happens.
In June 2014, the EU and Ukraine signed the Association Agreement, including the Deep and Comprehensive Free Trade Area (DCFTA), which promotes deeper political ties, stronger economic links and respect for common values. See here for more details about EU-Ukraine relations.
The total trade turnout between the EU and Ukraine increased to 50 billion USD in 2018. During 2015-2018, Ukraine increased its exports to the EU from 13 billion USD to 23 billion USD. Overall, in 2018, Ukrainian exports to the EU increased by 13.1%. Now, the EU accounts for almost half of Ukrainian exports.
See here for further information about the DCFTA and the cooperation between the EU and Ukraine.