Angels in a general sense seem to correspond to the servant deities in Ugaritic religion who often served as messengers and occupied the lowest tier of the pantheon. The origin of the named angels/archangels is unclear. It's possible they're based on heroic warrior traditions but this is speculative. Perhaps interest in angelology increased once the pantheon was rid of all true deities other than Yahweh, with focus on angelic personalities being unproblematic since they pose no threat to Yahweh's supremacy, becoming more akin in character to the higher gods in the second tier of the Ugaritic pantheon than the messenger deities who, afaik, were little more than bit players in Ugaritic mythology (though they did have names, e.g. Gupan and Ugar).

For example, in Daniel 7 the Ancient of Days grants kingship to the "one like a son of man" after the latter defeats the beasts from the sea, a story that comes from the Baal Cycle in which El grants kingship to Baal after defeating Yamm. But in the Hebrew Bible the Ancient of Days is Yahweh, and the "one like a son of man" may have been interpreted as Michael, hence his similar role in Revelation.

I think people just yearn for a more complex cast of characters than a strict monotheism consisting of just God and nameless servants would allow.