Bulgarians might be fearless and good at fighting, but this doesn't mean they are simple-minded, muscle-bound fools.
On the contrary, when the allied forces were only a few kilometres away from Sofia, the furious criticism and accusations towards the Prime Minister from the Bulgarians began to turn into panic. Suddenly, the support for the Prime Minister started to increase.
At this moment, Ferdinand became rather shrewd, he refrained from being involved in the current affairs of Bulgaria, acting indifferent, waiting for the situation in Bulgaria to develop.
In fact, this indeed was the wisest decision he could make. For present-day Bulgaria, both the pro-war and pro-peace factions have their mistakes. Only by emerging from the current abyss in Bulgaria is it possible to save themselves and survive the war.