@PSRTExperience It's a matter of nuance. While "worse" is technically the right form here, "badder" implies playfulness and mischief. If the TL/PR had put it as "worse", it wouldn't have sounded playful like she intended, but more like she was asking him to do something evil or criminal (I'm exaggerating a little but that's the direction the meaning would have gone)
I think it's really telling about this series when a "cliffhanger" like this happens, not a single person is excited about what's going to happen. Everyone here is just rolling their eyes at how bad this "situation" is. 😂