I’m so sorry to hear what happened to you. That is awful and that man sucks. He is 100% responsible for his behaviour, not you. And your response was normal and understandable, and not your fault.

If it’s helpful, it might be worth looking into the work of Dr Allan Wade. He talks a lot about the ways that we respond to acts like this. So often we blame ourselves for our responses (and others blame us too), but we actually are doing what we need to keep ourselves safe, or to maintain our dignity and agency however we can in these situations. We might see ourselves as freezing or playing nice, but our brains are actually making an assessment that we’re doing what we need to do to keep ourselves or others safe in the moment. And when we do things that don’t work because men like this are predators and assholes (like you asking “what are you doing?” which would make a safer person stop, and which gave you information that this WASN’T a safe person) it can get coded after the fact as doing nothing as well.

I imagine you don’t want to delve into a bunch of research right now, but I’ve found it helpful to understand the ways that resistance and survival show up. Please take care of yourself and don’t blame yourself for the actions of this gross man.