why was sirajuddulah so easily defeated by the british Share with your friends Share 2 Madhumita Das answered this Siraj-ud-daulah was easily defeated by the British because he was betrayed by the commander of his army, Mir Jafar, who sided with the British in the Battle of Plassey of 1757. 2 View Full Answer S.k.lakshin answered this Because , Sirajuddulah less powerful than British -4