I believe one reason romances are so often criticized is because they are too often convenient. I've been reading Christian romances lately. Christian romances have their own particular motifs, but they also follow the traditional romance format. And part of the traditional romance format is to create odds that the couple must overcome. And sometimes the overcoming is a bit too easy.
The particular Christian romances I am reading are evangelical, meaning that divorce of the unhappy couple (so that the happy couple can get married) is frowned upon. This type of solution is rather distasteful, and most romances avoid it. However, the alternative is so outrageously convenient, it becomes hilarious after awhile.
The alternative? All the inconvenient people die. Slews of them! They drop dead like insects in one of those zapper things. Horrible husband--zap! Horrible wife--zap! Watch out: there goes another one.
Jane Austen never did that. And she lived in a time when it was far more likely for people to die at the literal drop of a literal hat. But she doesn't kill off the dastardly Wickham. She doesn't even kill off the flighty Lydia from some wasting disease. She doesn't kill off the horrible father in Persuasion. She doesn't kill off the snide chick in Mansfield Park. She doesn't kill off anyone in Northanger Abbey (who isn't already dead before the book begins). I believe someone conveniently dies in Sense & Sensibility, but it was her first book, and she doesn't kill off the real villainness, Lucy Sharp (although she does marry her off conveniently; again, it was her first published book). Nobody dies in Emma or in Pride & Prejudice. People are left unhappily breathing to work their way out of their problems.
To be continued...