Mediocre compared to what, exactly?
Gutfeld was on a Fox talk show called "Red Eye" in the early 2000s and even though I wasn't based or red pilled or politically knowledgeable in any way I thought his banter was very funny. I liked his stuff coming out of nowhere. And I had an anti Fox bias at the time.
You either enjoy the talk show format or you don't, I guess. He's brilliant compared to staged establishment parroting sock puppets like Jimmy Kimmel.
More viewed than Colbert, Kimmel or Fallon.