What caused john de courcys downfall?

John de Courcy's downfall was primarily attributed to his increasing ambition and the consolidation of power in Ireland, which led to conflicts with other Anglo-Norman lords and the Irish nobility. His aggressive expansionist policies and attempts to establish dominance over Ulster created enemies, culminating in his eventual defeat by rival forces. Additionally, political intrigues and the shifting allegiances of the English crown undermined his position, leading to his loss of support and power.