THIS is what I struggle with, when it comes to WW's super-villains.
I just don't think they're that special, in how or why they are Diana's enemies. Circe, Cheetah, Grail, Cyber - they could really belong to any superhero's rogues gallery, because there's nothing about the threat of them that Wonder Woman seems uniquely suited or driven to challenge. I this way, they're all sort of painfully generic, because writers don't seem to be interested in taking their individual quirks and writing stories around them, in such a way that makes them special to a Wonder Woman story.
Again, ..I think this is because we don't really know the hero, Wonder Woman. We're left to presume that she is super-Oprah, saving Cheetah from low self-esteem, or a sword-n-sandal answer to Green Lantern, patrolling man's World for fantasy-genre threats, like monsters and Krakens. We don't really know what the hell Wonder Woman is doing here, after World War II, ..or what she's supposedly protecting us from.
If you asked me who her archnemesis is, I honestly couldn't tell you, because I haven't read the definitive WW story, in which Diana faces a threat or antagonist that defines her reason for existing. In spite of their potential - Myrina Black as her Magneto, Circe as her Brainiac, Clea as her Kurgan, Cyber as her Doctor Doom, etc - I don't see a story that cinches how or why Diana is uniquely suited to protect us from them ..or stop them.
I think James Tynion's Witching War, in JLD, was a step in the right direction, defining Circe's contempt for humanity and making it justifiable to us. It was a great story, ...but, it wasn't Dark Knight Returns. Does Circe want to conquer all of reality or just Earth - that so she can torture us all for betraying her? Read Witching War, and you can understand why she's always probably going to relapse into seeing us all as cowardly, ungrateful vermin and plotting or eternal torment and degradation, as her 'things'. Tynion makes it make sense to me, but, we need about a cycle of similar stories that have Wonder Woman flying in, even when she's disgusted with us for our bigotry and warmongering, and stopping Circe from giving us the punishment we... (probably, a little bit) deserve? I need a cycle of stories that consistently show Circe pursuing the same goal - torment of mankind, world domination, etc - and Diana, equally consistent in being uniquely suited or driven to stop her, to sell me on Circe being Wonder Woman's Moriarty.
I once said Diana needs a Ras Al Ghul. I think Circe could be her Ras, ..but, I need about a half decade of stories to convince me. I need that half a decade to emotionally and psychologically invest in the idea: Circe is the WW comic's answer to Ras.
I need a cycle of Darkseid Wars, showing Myrina Black - NOT Grail - fanatically pursuing the loving subjugation of Man's World to Amazon rule (hers, specically), to sell me on her being the megalomaniacal villain, whom Diana was born to protect us from ..or destroy! Myrina, and NOT Grail, is the fanatic renegade, who is Magneto to Diana's Professor X, ..but, I need a cycle of stories showing the wild-eyed extremes she will go to, to conquer the world, ..in the name of saving us brutes from ourselves. I think this can happen, with editor and writers committed to using a prolonged enmity with Myrina to define Wonder Woman, ..in the way that the X-Men's prolonged enmity with Magneto has defined their mission and reason for existence...
And the same goes, with the rest of the villains, I mentioned - Clea as her Kurgan, Doctor Cyber as her Doctor Doom, etc. We need stories - stories on top of stories, on top of more stories.