How the hell is it appropriate to interrupt a victim to bring up pronouns
Perhaps to clarify they were talking about the same person?
And the incident itself wasn't caught on camera, just the victim's description of it.
If a victim doesn't cooperate with a prosecution, there's no other witness to the incident, and no strong proof that injuries occurred at the hands of the alleged assailant (eg bruising from a fall - did they trip or were they pushed?) then it's not so surprising that the case failed.
However it's good that the police pursued it without the victim's cooperation. That didn't used to be the case in domestic violence incidents.