You read that right, she says she regretted writing Ron and Hermione's relationship. I dunno why she said that to be honest. I get she has regrets because its just the nature of the beast when it comes to writing but she should have stuck to her guns. Saying she regrets stuff now invalidates what she previously wrote.
I mean, I wanted Harry/Hermione together and I was really disappointed when it didn't happen but still, Rowling shouldn't go about invalidating her original work.