I think Austen portrays the difficulties faced by women brilliantly.
The Bennets: will be penniless thanks to an entailed estate and feckless parents (Mr Bennet is really not an innocent - he's a neglectful and passive father at best) who saved no money for their settlements.
The Dashwoods: primogeniture places them at the mercy of their avaricious brother and sister in law.
Fanny Price: poor and female, her choices are zero. At least William gets the opportunity for independence in the navy.
Anne Elliot: no longer a fresh faced teenager, her life dictated to by a shallow father obsessed with the Elliot name and rank.
Emma: a scathing indictment of what it is to be rich, pretty and utterly spoiled. Austen is very very careful to show that Emma's worst social crime is to expose Miss Bates - poor and middle aged and single - to ridicule. I know many don't like Mr Knightley but I love him because he is the only person who actually expects Emma to behave like a decent human being and not a coddled princess, and is hard on her (even if it's just pointing out that she never practised the piano or read enough improving literature.)
Catherine: one of a big family. Marriage is her only route out of a life looking after younger siblings and the poor of the parish. If she hadn't been fortunate enough to meet Henry Tilney, she could have been another Miss Bates.
The price of transgression in Austen's world is very clear. Lydia gets off amazingly lightly compared to Eliza. Maria Bertram suffers a fate worse than death, living with Aunt Norris in the country. Austen is far from a social revolutionary, of course. She's a clear sighted realist who created Charlotte Lucas, and poor Jane Fairfax (who doesn't really get a happy ever after - Frank Churchill is awful) However, I just can't see her as complacent. I think her understanding of human nature is second to none in English novels. (I know a Lydia Bennet. And a Mr Collins. And a Mrs Elton.)