Losing Berlin means losing administration as well as leaders

What would happen if Berlin were destroyed just after the German victory in Greece?

The result depends on who was there and the extent of the destruction, with both a succession struggle and the loss of civil administration possible.

The hypothetical destroys Berlin just after Germany's victory in Greece. If Hitler and other senior leaders were in the city, the immediate political problem would be a struggle over who took power. The result also depends on how extensively the destruction is defined. Losing the capital's civil administration and records could disrupt the state even beyond the loss of individual leaders. Those assumptions determine the scale of the crisis, leaving the eventual course of the war unresolved.