Xiao Feng's one question in return completely shut down everything Yao Qianxue was about to say.
What do you mean "too much"?
Plainly put, it's just the "cause" and the "effect" – the psychological gap between the two is too big.
Like, two total strangers walking down the street, A steps on B's foot.
B curses A out, people might think he's making a fuss over nothing, but they still won't think he's over the line, since A was the one in the wrong first.
But if after A steps on B's foot, B doesn't say a word, just whips out a knife and stabs A in the gut several times, that's something people can't accept.
The same logic applies here.
The reason Yao Qianxue feels Xiao Feng went too far, is because him flicking the cigarette butt into Black Tiger's mouth went beyond what she could handle mentally.
Of course, this is separate from mental toughness, you can't lump it all together.
