"Another is the belief that the sisters have leverage over God by choosing to suffer. Their suffering makes God very happy. He then dispenses more graces to humanity."
Oh boy. A badly cathecized Catholic convert. Why do they join austere orders in the first place?
I think she really misunderstands the concept of attachments and how one overcomes every attachment to every creature other than God and by creature I mean his creations and gifts. That attachment also extends to one's comfort and pleasure.
Anyone with a copy of the Bible or the Catechism could refute this ridiculous "leverage" idea in five seconds.
When people abandon the truth for a lie, they need to lie about the truth to feel better.