What is Austen's intention when she writes about Mr. Collins that ''Elizabeth was prepared to see him in his glory?

Elizabeth is being her "cheeky" self. Her sarcasm comes out when she says she was prepared to see everything she missed by refusing to marry the pompous Mr. Collins,

"Elizabeth was prepared to see him in his glory; and she could not help fancying that in displaying the good proportion of the room, its aspect and its furniture, he addressed himself particularly to her, as if wishing to make her feel what she had lost in refusing him."