Why did the war sharply worsen the situation of the population of England and France?

Of course, France and its population suffered the most, since the hostilities took place on its territory (settlements were destroyed, civilians died, crops were burned). On the other hand, every war requires large financial costs. In this connection, the kings and authorities raised taxes in order to supply and replenish the army. Thus, the population suffered. Ultimately, the Hundred Years War ended in 1453 with a French victory. England conceded, as the struggle for power began there.