The situation in Serbia is much different than in Ukraine in 2014. In Ukraine there was a clear majority who wanted their country to join EU and finally break away from Russia. In Serbia, this isn't a pro EU or anti-Russia protest. Vucic and his cronies might be the most pro-EU party in Serbia. This is just people being tired of their corruption.
Unfortunately, vast majority of people in Serbia still blame the West for the terrible wars in the 90s and reject to accept any responsibility for their actions, including for the Srebrenica genocide. They are still sowing discord in the region and in Bosnia, Serbian separatists (fully supported by Vucic) have literally brought the country on a brink of another war.