Firstly, British complacency and their gross underestimation of Japanese troops resulted in their lack of preparation for a land assault, as they assumed that any invading force would carry out a naval assault, without considering the possibility of a land assault.
Secondly, the British only had inexperienced or untrained troops equipped with outdated weapons to fight against the Japanese troops, who were experienced, well-trained and equipped with modern equipment and weapons. However, British soldiers considered themselves as a better-trained and better-equipped force than the Japanese, who they were prejudiced against. This prejudice is evident in the fact that British troops thought that all Japanese soldiers were near-sighted and that they could not fight at night.
Thirdly, the British’s dispatched planes, of which the majority were obsolete, were inferior compared to the Japanese Mitsubishi A6M2 Zero, and were flown by untrained pilots. The lack of British Hurricanes was the result of their complacency, as they thought that the Japanese planes were made of stick and paper, and could be easily defeated. As a result of this complacency, the British fighters were severely outclassed, and the Japanese assumed air supremacy easily. This would eventually lead to the British suffering heavy losses on both land and sea and play a key role in their defeat.
Fourthly, the British were inferior in terms of tactics and coordination. Despite repeated flanking attacks from the Japanese, they still stubbornly believed that the Malayan jungle was impassable, allowing themselves to be outflanked and resulting in British units