Daenerys' role is pretty much one of an entitled incompetent, who really needs to be relatable to lampshade the objectively stupid or destructive things she does. Clarke played her as snotty and aristocratic and spoiled, with no apparent motivation beyond "I'm better than you" or "because I can." You can forgive her and Lena Headey for doing the same thing, since from the actors' perspective, they might as well be on different shows, but you'd think the directors or writers would have worked around the redunancy at some point. Sometimes it seems like they are trying to show two alternate realities of the exact same person, one where she has everything handed to her, and people eventually get sick of her bullshit and one where she got to spend a decade and a half as a doormat, before being handed tons of unearned power. And in each case, the solution to being balked is generally mass murder.

At least in Terminator, she was supposed to be difficult and unapproachable, since they were trying to play her as having grown up much differently than the everyman character of the original film.