These HarleyxJoker antis and HarleyxIvy stans just don’t get it. Taking away a villain’s obsession is taking away the villain itself. Two-face would just be any old deformed criminal without his obsessive with making everything “fair”. Mad Hatter would’ve just been another bland criminal if it weren’t for his obsession. Scarecrow too if he wasn’t obsessed with fear.
So by taking away Harley’s obsession, The Joker, you’ve just got someone who isn’t Harley at all. Now, I’m not saying that she can’t be with anyone other than Joker. But if she is, she’s still obsessed with him. Obsessing doesn’t always have to be with love. She could be obsessed with wanting to kill him (even though in most of the comics that just comes back to loving). Her obsession is literally part off her character!
Some people just want her to leave Joker and forget all about him, but that’s just OOC. Even if she leaves Joker, even if she pushes him to the back of her mind, he’s still there.