Would you accept him as a villain? He's gone back and forth twice, what if it sticks and he becomes Wonder Woman's Loki? He has sufficient power and motivation. He's slept with Grail and allied himself with her. Even most recently he's been tempted by the Dark Fates.
Is there anyone more hated by Wonder Woman fandom?
If he has to appear occasionally, wouldn't it be better if we loved to hate him?