According to MassingMos in Serbia :
Why protest actions expend so typically

AFP
The Serbian protest motion threatens to fail like many others earlier than it. The cause is at all times the identical: the refusal to work with events.
https://www.faz.net/aktuell/politik/ausland/serbien-warum-auch-diese-protestbewegung-zu-scheitern-droht-110437644.html