Which event was more humiliating for the British?

The fall of Singapore or the Suez crisis.

In the Suez crisis, all America had to do was move numbers around a computer screen and the British economy would have collapsed. Britain as a country would have faced a societal collapse and mass starvation, leading to a famine.

In the fall of Singapore, the British outnumbered the Japanese 5 to 1 yet their forces were destroyed in expeditious manner. Similar to how the Nazis brought France to its knees in just 3 short weeks. Churchill called it the worst military defeat and capitulation ever by the British armed forces.