His anti-EU statements are only statements and there's not a lot of bite behind the bark, ultimately. The only times he does something that isn't 100% neolib bs is when it goes against public opinion in Serbia so much that it would be political suicide to do the opposite. One thing you have to understand is that the public here is massively against western imperialism (particularly NATO) and he is an EU client. So he has to do this balancing act, where he is forced to make moves that aren't totally awful is because of that. In return he gets to rule the country like a Batista, Somosa, Noriega etc. and not be considered a dictator by the "freedom-loving" EU.

Thanks to being a little dictator, our foreign policy also deeply depends on him, and he has not proven to be a negotiator in any capacity, being fully humiliated by the US, EU and Kosovo. The Serbian Progressive Party also can not offer any other cadre to replace him in that role because it's a bunch of the dumbest, most servile clowns gathered around him. Thanks to those two reasons there is no hope for Serbia to escape the EU's grip in the near future.