They wanted a lot, achieved little, and quarreled with everyone
In its desire to establish itself as the center of the region, official Belgrade increasingly resembles an isolated island. The quarrelsome attitude suits the right-wingers in neighboring countries the most, and the population the least, which, even in Montenegro, views the authorities in Serbia with growing suspicion.

TL;DR
- Serbia's attempt to be a regional leader is leading to isolation.
- President Vučić's rhetoric and actions have damaged relations with Croatia, Bosnia and Herzegovina, and Montenegro.
- Neighboring countries, particularly right-wing politicians, benefit from Serbia's confrontational approach.
- Public opinion in Montenegro views Vučić as a problem for Serbia and the region.
- Serbia's foreign policy is perceived as undermining regional cooperation and European integration efforts.