Her testimony was so damning, you know they had all the fact checkers going through every line, and every word she said, to find something they could claim to hurt her credibility.
It's the typical attack the messenger, instead of the message.
Plus a lot of her testimony was "hearsay", things that others who chose NOT to appear before the committee, had told her of the events around January 6th. If they dispute what Cassidy claims they said, they should march down to congress and raise their right hand, before claiming they didn't say, what she said, that they said.