haha yes for The Crown haha

The guy was nicknamed "Apis" (Bull). He was a leader of a clandestine organization of officers in the Serbian army called "Black Hand" and was later tried and executed because he was too dangerous and he kept killing people.

All the major nations chimped out about the assassination of Alexander and boycotted the handover of power to King Peter, but apparently forgot it happened by 1914.

Alexander was hated by the people because he married a woman who couldn't have children. He was dead set on ending his own dynasty. His father Milan was hated because he (unconstitutionally) divorced the Romanian princess, who was very much liked by the people. This event actually caused the very first riot in the independent Serbian state, where a dozen people died.

So yeah, people complained, but Peter was actually a pretty decent ruler, so everyone accepted him in the end.