On the one hand, I think everyone hates that person who pulls the "I'm an empath" card.
On the other hand, "empathy isn't real" is a bad faith attack on the concept of trying to emphasize or even understand people that are different from you.
That's what I got from every Charlie Kirk debate I ever saw: a machine gun of bad faith counterarguments.
Debate is about understanding where the other person is coming from, identifying weaknesses in each other's position, and working towards shared truths.
Since he couldn't empathize, Charlie couldn't debate. So he went with the modern debate strategy: I only win when someone else is losing.