About getting real to make people complaint: usually there is a dilemma for us Chinese - when your boss ask you whether you have something to complaint or whether he/she has something wrong, he/she did not mean it. It's just a gesture for generosity and the employee should be thankful about it.
We all know this is quite wrong, however it is often brought up to pique some sort of black humor that the bold and honest employee make real complaints and get back luck.
In this context, when sometimes (also quite often) a leader truly wants to hear some feedback or some advice, what he/she must do is much more than just ask. In fact, it's quite an art to extract real information from communication. I guess it's the same all over the world.
The word "get real", in this context, suggest its seriousness, even forcefulness subtly
I guess you may not have heard the lines in whole and may have put the ones you heard in wrong order. Here is my guess
A ask the employee B whether the work is exhausting:
B says yes
A thinks B is ... (a complainer?? information missing) and then B got fired
A ask B the same question again
B says no
A thinks B is a dumb-ass: how can one hire a dumb-ass? B got fired again
A ask B the same question the third time:
B says "yes but also no"
A thinks B as someone not focused on his work and not working hard
B got fired again (T-T)
the last sentence 他绝不能听见别人问他累不累。他一听呀，条件反射。
I guess 他 is the B person who is now not able to be asked whether his job is exhausting - as he has been a little bit traumatized.
Also, the point are from the dilemma.