How did britain and france emerge from wwi as both victors and losers

Great Britain and France were both winners and losers of the World War I. These two nations were winners because at the end they were on the side that won the war. Because of that they were also able to constrain their main enemy, and managed to have some benefits. But they were also losers in the war. This was because both of them had lot of damage in their infrastructure especially France. Both lost of lot soldiers which weakened them in a military sense, and both had huge economic losses and very fragile economies afterward. That eventually led to gradual loss of their power over their colonies, and after the World War II they lost them as they were where not able to control them anymore after the damage they had at home.