I'm not sure what you call this fallacy. It's not really whataboutism because you're not equivocating against another argument, but instead you just discard it and push forward on the path that you've chosen for this interaction. I guess it's begging the question. I can see that this would be a powerful technique in a more open forum, or against an uninformed audience, because by pushing like this you imply that you are so correct that no other argument need even be heard. What is the "win condition" here for you? Do you have any other examples of your work, or do you cycle out soon?