Let me be clear; I have no problem what-so-ever with female characters. Cass Cain, Stephanie Brown, Artemis Grace, Artemis Crock (from Young Justice animated series), and several others I greatly enjoy.
Harley, I even read her series during the first year or two of Rebirth. Maybe its burnout? But now, I just don't want to read something where she's a main character or whatever in it. Heroes in Crisis, before her little stint of somehow pulling a fast one on the Trinity, was already an awful, terrible mess. Her doing that, that was just too much for that storyline. Even for the absurdity that is rather commonplace in comics, that was simply bad writing.