So they hold resentment because no one came for their and because they stayed still all those years? They never were able to left, nor they rised to a recognize position, they're just from the clinic and they can't even use medicines because it's forbidden to women.
Maomao understood that they knew about her father's list of recommendation but they never told anyone about that. Which means they're partially at fault for the baby who died, and it was probably a "victory" for them...