You did fine, I like your response.
Anything that is not defensive and doesn't jump into her hoop/frame. A flase disqualifier seems good here.
Examples:
"Dunno, maybe you just attract lame guys."
"Dunno, maybe you're just a sex object."
"Haha, I'll hook you up with one of those poor dudes."
"Not sure, fuck me."
"Reality check. You got a pussy, they got a cock, grow the fuck up

"
"I don't care."
"Why are you telling me?"
"Haha, you're so cute."
"Shutup you weirdo."
Haha, I like the last one, I'm gonna just that next time.