He didn't say what you were going to respond.
"Say I'm wrong, and that she never meant for it to get so out of hand." Is him saying "let's assume I'm wrong, and etc etc"
Comparing people with a volleyball, on the other hand, is pretty clearly an insult/ad hominem.
What I’ll actually say is that you appear to have decided that she got what she deserved, and everything you’re arguing is post-facto reasoning to rationalize the decision you’ve already made.
I might as well have a discussion with a volleyball.