He just refuses to answer a single question. It's irritating. And the "moderators" are skewing their phrasing to benefit her and make him look bad. They have done it multiple times.
Considering that the topics are blatantly rigged, it's like griping that you "refuse to answer a single question" when the cops ask "when did you stop beating your wife?" or "do you have any regrets about false accusation from the cops"
They did phrase things pretty much like that some of the time. However, there were many direct questions: How would you handle THIS situation? And he just would NOT answer, it was infuriating.
Do any examples come to mind? The only direct refusal to answer was a Federal abortion bill, which as he correctly pointed out was implausible. It's like asking "Would you veto a Federal bill repealing SSI"...a thing which is a political impossibility.