Relevant quote from TFA: Dave Karpf, who has written two books on the use of data in modern campaigns, calls Cambridge Analytica “the Theranos of political data.” Eight GOP political consultants told Ad Age’s Kate Kaye that the company was “all hat and no cattle.”

Maybe it's because I'm from Texas but "all hat and no cattle" is about as damning an insult as they come. It's the equivalent of "full of shit".