Republicans make clear their contempt for government. They just don't like it. And they don't like politicians.
So imagine that you are a member of this party and it is your job to run this government that your party so hates. You couldn't be happy about that. The only thing that might be worse is to be running for president and being considered unworthy of a role most of your party holds in contempt. Not even deserving of contempt. Hmm. How could you be anything but angry?