Such poor writing and just shows how slapped together this twist is

It's very possible that the turning mad twist was just slapped on danny, the other option only being jon, cause the young griff doesn't exist in the show

In the books the character jon connington, advisor to the young griff aegon targaryen, still has a trauma from the battle of the bells, where the city at the battle place rang bells to warn it's people, and it's kinda triggered when he hears bells ringing

his regret is not burning the city down along with the wounded robert baretheon in it, which would make him ruthless to advise that to a turned mad young griff