Why was the popes claim of papal supremacy a problem for leaders of the Orthodox Church?

The pope's claim of papal supremacy posed a significant challenge for leaders of the Orthodox Church because it undermined their authority and the established structure of ecclesiastical governance. Orthodox leaders believed in a conciliar model of church leadership, where authority was distributed among bishops rather than centralized in the pope. This divergence in views on church authority contributed to the schism between the Roman Catholic and Orthodox Churches in 1054, further deepening theological and cultural divides. The papal claim also threatened the autonomy of national churches within the Orthodox tradition, leading to tensions and resistance among Orthodox leaders.