The entire chain of events is perfectly illustrates the contempt of the Western female for average, beta men.
In this girl's mind, the bus driver is basically a non-person, entirely unworthy of her respect. So unworthy, in fact, that she feels entitled to punch him in the face. When he dares to defend himself, she seems shocked and confused. "How dare he? Who does he think he is? Does he not see that I'm a female?" she must have thought, and as a fellow rider pointed out. "That's a female!"
Yes, a female. Is that supposed to make her a protected species? Does that give her a license to behave like a complete jackass in public and face no repercussions from her behavior? In her mind, yes.
A large amount of modern women have this mindset because they are simply oblivious to the work that men do, and it is only that work which allows women the luxury of being so oblivious in the first place. Men built and maintain modern civilization so that ungrateful bitches like this can walk around and pretend to be badasses.
Western men are largely victims of our own success in this regard. We've built such an impressive and highly functional civilization that has been operating smoothly for so long that women have completely forgotten how it came to be and have no idea how it operates (I'm sure I don't have to point out to anyone on this forum how shockingly ignorant of history and complex systems most women are).
The result is that they feel entitled to disrespect and degrade men at will, since they basically live in a bubble insulated from reality.
Of course, when reality hits, it hits hard.
Sometimes in the form of a vicious uppercut.