There are almost no tough players or coaches anymore these days.
When Steph was out there dribbling around and showboating using Muhammad Ali footwork, that would have been the perfect time for someone to go out there and whack him. Make a play on the ball so it's not a flagrant 2 but make sure the rest of your arm catches him and knocks him on his ass. If they don't like it they can either play respectable or continue to get knocked around until they do. We were going to lose the game anyway so you might as well lose while demanding some respect out there.
Sadly, those days are long gone in this neutered league we call the NBA.