Awkwardness with superpowers
Also another characteristic someone as competent as Supergirl does not have.
https://www.supermanthroughtheages.com/tales3/greatest/?page=72
It would have been great to send her on a couple of dates with a Reggie type.... "If looks could kill...."
There are many characters I can see as dating jerks. Pre-Englehart Scarlet Witch, for instance, comes to mind, because she was impressionable and not a very assertive person (which changed when she got the courage to admit she loved an artificial man).
Supergirl is very, very low on that list as well. Like I said, she's tough.
I did not mean SG would not "own" such a jackass. Would not give him a few scorching looks of reproach with her volcanic blue eyes. Would not take his hand playfully in hers and lightly grind a few bones. Plant a girlish coma-inducing superkiss at evening's end. I meant only that I would have liked to have seen it. Dick Malverne was dullsville.
I would have also have liked to have seen that teeny little girl put Mongul in a hammerlock and make him cry....