People are getting confused between what’s morally right and what would lead to a conviction in a court of law.
Of course, because we’re being presented with the full story, we know that he assaulted her. He was guilty. It doesn’t matter what else happened, as she withdrew consent so therefore anything else that happened afterwards was a crime.
However in a court of law, when it comes to almost any offence against the person, you can’t just go believing the accuser. You have to have evidence.
If the man is saying “She flirted with me, she sent me sexy messages (and here they are), she willingly came to the toilets with me,m which you can see on CCTV, then after we’d done it she asked me to be in a relationship and I said no, I don’t like you in that way (or whatever a similar story might be) and then she got upset and stormed out” Then having supporting evidence, even though that might be a total lie, will help that argument. Obviously that argument would be a lot harder if CCTV showed a woman who’d never met someone being dragged off into a bush, or messages from her saying she’d never sleep with him.
As a PP said, unless we have a system where we believe the complainant no matter what, such cases will always be hard to prove as a woman could verbally give consent to sex in front of witnesses, write it down, record it on video and then change her mind halfway through the act (which she has every right to) and if the man doesn’t stop, it’s rape.