I confess, the idea of Ollie as Dinah's arch-enemy is kind of growing on me. The way they beat on each other, sabotage each other, and make each other worse people and more incompetent heroes, there's certainly nothing else in the lives of either of them that's nearly as dangerous. And Dinah does sort of have a habit of dating black hats, and Ollie does have a habit of picking fights with heroes.
I mean at least if they put it out in the open like that and made it official, one or the other of them would occasionally win these battles, and the fact that they routinely punch and electrocute each other would stop raising eyebrows.