We knowBut problems in EU are progressing, too.
Not sure about that. You seem to be making two seperate pointsFor example - migrants. Serbs almost lost Kosovo and Metohia because of the uncontrolled Muslims migration (supported by EU countries, too) and, surely they don't want to lost rest of the country.
YepSerbs lived under Muslims' heel 350 years, and they don't want to repeat it.
That depends on your point of view and probably means ‘relatively rich’It is usually better to be rich citizens in the independent state, than suppressed and poor subjects in the Alien-controlled region.
Any source for that?In 2012 pro-EU were near 48% of population, anti-EU - near 33%. After Russian reunion with Crymea, that increased Serb's hope to reunion with Kosovo, migrant's crisis, Brexit' - attractivity of "Join EU" idea was fallen very and very significally. Now mayority is against such join.