In that the abuser is not always an out-and-out villain that jumps out of the shadows at the victim.
Except that, for quite a while prior to this point, she HAS been an out-and-out villain, LITERALLY. When people stick with abusive relationships, it frequently tends to be because they've been conditioned by either society or their upbringing, or both, to do so. I'm struggling to find the right way of saying this without sounding like I'm engaging in victim-blaming, but like alcoholism, there's often something that makes you susceptible to it (I have enough alcoholics on both sides of my family that, even though my parents aren't alcoholics, I make an effort to drink VERY rarely ... like, once every couple of months).
Without a LONGER-term relationship with the Tarantula, to make Dick susceptible on THAT front (since there are plenty of people who, yes, are won over by initially promising lovers, and by the time they realize they're in an abusive relationship, they feel like they already have so much time and effort invested that they see it as a failure on their own part to get out), this really felt like the OPPOSITE of a realistic portrayal. Rather, it felt like the gender-reversed version of a Lifetime made-for-TV movie, in which the female point-of-view character somehow manages to miss all sorts of glaring signs that All Is Not Well with her new beau, and then, even after she first realizes it, which is still usually relatively early into the relationship, she sticks with it, for reasons that are never explained in the story, beyond the implicit and misogynistic assumption that She Can't Free Herself Because She's A Woman.
I've known dozens of women (and even a couple of men) who have been in emotionally and physically abusive relationships, and who got out. I recognized NOTHING of them in Grayson's portrayal of Nightwing.