So let's have a look at it:
Her situation in life, the character of her father and mother, her own person and disposition, were all equally against her.Okay, egg-sucking detail: Austen is being ironic. These things do not match what is typical of novelistic heroines but they are the qualities Austen thinks make for a real life heroine for Catherine Morland is her heroine.
As we read on then, we should note what Austen thinks is important and what she thinks is not important.