I mean, there’s even other godlike characters in the Bible. Satan may not be the most powerful deity in the book but he’s canonically a deity. Same for angels and their ilk. Hell, even the later bits struggle to keep a lid on the numbers, jumping through hoops to make the claim that three deities is actually one.

Way back when, the religion that turned into Judaism was openly polytheistic, and simply held that Yahweh, the king of the pantheon and God of war and weather, was the only god worthy of worship.
Over time Yahweh merged with an adjoining religions god El, and started the transition to being the only god, instead of just the only worthy god.
This transition happened literally a thousand years after many of the earliest texts were written, so there’s a lot of verbiage where the deity explains that the other gods aren’t important, which is later clarified to them not existing, or really just being servants and not at all lower tier gods in a complex pantheon.
It’s why there’s so many weird turns of phrase, beyond it being thousands of years old and translated a lot.
“El” being a word that was used for both “a god” and “this god” didn’t help. “The high god divided the world for all the gods, and our god God the only God and creator of all was given our land as he’s the high god and father of God the only God of the sky and also that mountain”.

Different parts of the world took a lot of the same root deities and went a different direction with them. There’s a degree of overlap between aspects of ancient Greek religion and the Abrahamic religions because parts of each of them came from a common root. Just one mushed then together and made the grammar extra confusing. “King sky god”, “water god”, “afterlife god” being the children of mother and father cosmic creator gods. Also a big sea snakes who are up to no good. That one had legs, so to speak.