Theodoret of Cyrus
Why was Samuel troubled when the people requested a king? This request went against God's divine order. The Lord Almighty was intended to be both God and King to them, with the Prophet serving as His primary minister, akin to a lieutenant or leader of the community. God made this evident when He instructed Samuel, “Hear the voice of the people, for they have not rejected you, but they have rejected Me, that I should not reign over them, in accordance with all their deeds, which they have performed against Me: from the day I brought them up from Egypt until this day,” etc.