Earlier quoted context omitted.
How did you manage this with your employer?
And SO and kids?
As harsh as it might sound to put it this way, the answer for how some people will be able to manage better with their SO and kids is, "because I don't have your SO and kids for my SO and kids," or more specifically, "by not allowing my relationship with my SO and kids to be like your relationship with your SO and kids." For kids especially and with people I know who have this problem, it's because they infantilize and underestimate their kids (past the point where they're actual infants) and think "that's just how they [i.e. kids] are." Your question posed as if it could have an answer that would somehow be general/widely applicable (and not highly dependent upon the tendencies and personalities of the people involved as individuals) certainly hints towards this.