ADC Not a Writer?

I've been watching Dice on Sky Atlantic in the UK.
Didn't know much about the guy, but Sky are showing some really good lesser known American stuff (Big Time in Hollywood for example).

I've found this really good, with the Brody episode being genius.
But ADC is not on any of writing credits?

I wonder if the writers are trying to make him more likeable than he actually is? What with going to a gay wedding, letting his GF get a job!, and repeating that he and his stage persona are completely different several times.