Atheists, what is your take on this comment regarding morality and good/evil?

This is a youtube comment made by a supposed Christian under a video response to an Atheist user. Anyway, here it is:

"’I'm not even five minutes into the video yet, and this so-called “skeptic” is a horrible debater. His argument fell flat on his face when he claimed that evil exists “self-evidently.” That’s not how a rational debate works. You can’t just say that something is self-evident; you have to prove that it exists. Evil exists self-evidently? Prove it. If evil exists, then it follows that objective morality exists, otherwise “evil” is nothing more than “actions that you personally dislike.” Therefore, if objective morality exists, God must exist.

He also says that “a good thing eliminates evil as far as it can.” Oh really? Prove it. Again, he states this as it’s somehow self-evident, which it is not. He just read that, but he never explains why this is true. Good does not always have to eliminate evil as far as it can."

How would you respond to it?. And for the record, I'm sincerely not trying to troll. I'm a non-theist myself. Thanks in advance.