I don't mind sharing Wondy Villains, but I'd rather they go to heroes who could use a more villains.
Like Aquaman can fight Queen Clea who controls one of the 7 Sea kingdoms
Or Black Adam/Hawkman/Nabu could have history fighting Osira back in Ancient Egypt
Doctor Cyber could become an interesting rogue for Cyborg
And everyone likes Giganta hanging out with the Atom or bullying Bumblebee
But Superman/Batman/Flash shouldn't get to bogart all the villains