Possibly a variation on the attribution bias: Wildly underestimating how hard it is for other people to change.

While I believe that both attribution bias and my unnamed bias are extremely common, they contradict each other.

Attribution bias includes believing that people have stable character traits as shown by their actions. This "people should be what I want-- immediately!" bias assumes that those character traits will go away, leading to improved behavior, after a single rebuke or possibly as the result of inspiration.

The combination of attribution bias and "other people should change immediately" bias suggests a third bias: Outrage bias, a habit of seeing the world in such a way that it's reliably infuriating. This is especially visible in politics, but it's common enough in columnists generally.