Has it ever occurred to you (everyone, not just you personally), that maybe, Rosario, like many people, doesn't enjoy her bosses, but "goes along to get along"? Just because someone stays at a job doesn't mean they love it -- or their bosses. As far as Rosario understanding the VPs "humour"? Again, here we are -- where everything Lisa and Ken does is a joke, meant to be taken lightheartedly. But anyone else? No Ma'am!
As for the "house help" comment? In my personal experience, I've always noticed that people who say things like that underpay the help, expect them to jump through fire hoops, and work like they're Dickensian children -- yet always find time to complain about "not enough good help around, these days...." (Not saying that's you, just talking about my general observations of 4+ decades of living.)