Steph's frustration wasn't really a big deal. The game was out of reach and there were definitely a handful of calls he didn't get that were borderline funky, plus LeBron been giving him a taste of his own medicine with the in-game arrogance and dismissiveness, so all the frustration bubbled over.
But his wife really annoys the fukk out of me, and needs to fall the fukk back with her embarrassing ass twitter presence.
In general, Steph is one of the most arrogant showboating dudes EVER, by the way. And being relatively "small," babyfaced, and light is absofukkinlutely influencing the (lack of) perception of his behavior. I don't see how that's even up for debate.