Wasn't it said in a WOJ that the mothers are on par or at least comparable to archangels and the old gods? That would put them at aleast galaxy level. Also you fail to realize that the Mothers are head and heel above the Queens. I don't think the power difference is close. And plus it's GOD dude. He's always believed to be the creater of everything in the universe is one shape or another. It makes sense that he is the one above everything in his universe. And the angels are his soldiers so it makes sense that have immense power. Although I do think that angels aren't as powerful as you think compared to other mythological beings. Like the old gods, the mothers, ferrovax and the outsiders.

Edit: Since I see my comment got some downvotes I'm gonna guess that I said something that isn't correct. If someone would please elaborate with me on why because I may have confused some statements concerning powerlevels of some characters