Ron and Hermione

Ron married Hermione at some unknown point.¹ Hermione worked for the Ministry,² while Ron initially worked for the Aurors,³ then joined George at the joke shop.⁴

I think that Ron and Hermione are a disaster waiting to happen. While I do not believe in divorce, it is almost certain that Hermione would have. I can only think that unless magic makes divorce impossible, the two of them would have ended up in that state. By the epilogue, Ron still shows both a characteristic laziness and a total disregard for the rights of non-magical people, for their worth, and for the law. These are all things that Hermione has dedicated her life to championing. While I understand the whole “opposites attract” thing in theory, I do not believe such diverged personalities could truly work together.

Mrs. Rowling has stated that this relationship was a form of self-insert wish fulfilment.⁵ I do not think her comments really say that she intended a Harry/Hermione pairing, but rather that there is something in Harry that Ron lacks, and that this lack is important. Mrs. Rowling’s latter comments that Ron and Hermione’s marriage would “maybe” survive with help from counselling, and would “probably be fine,”⁶ is less than optimistic. This suggests that divorce is, in the characters' minds and morality, a possibility, and perhaps even a probability.

https://www.librarything.com/work/3577382

http://www.the-leaky-cauldron.org/2007/07/30/j-k-rowling-web-chat-transcript/