Ad hominem attacks are not criticism. They are logical fallacies.
Criticism: Her thesis is poorly worded/researched/presented. Followed by presentation of evidence of this.
Ad hominem: She's just looking for fame. She doesn't even play video games.
I like how they teased the reveal of just a regular looking dude. And yeah, Oliver practically declaring war on the fucking League Of Assassins so he can protect a person who killed hundreds of innocent people is too stupid to comprehend.