I didn't hate Miko all that much. I remember when she was introduced, we (the readers) were frustrated because the story was taking a tangent and it felt like there was a railroading DM using Miko to lead the party by the nose. I didn't like the situation either, but I thought Miko was an interesting character.
It was disappointing that while Miko's character was being explored, Rich was (IMHO) doing what he often does, reading the boards and adjusting his writing in reaction, making her ever more unlikable. So I thought okay, I'm not supposed to like Miko. Then Roy gets the line to call her a bitch and it's pure fanservice. This is the word fans have been using to describe Miko and it was ugly enough there- I don't want to get all into double standards, but when Nale betrays the Order he's evil and it's shocking. When Miko wrangles the Order and acts dogmatically she's a bitch.
When Roy said it, it was disappointing. Rich just disappoints me sometimes.