So she can't tell a Slough and a Sloth apart? One is a wetland. One is laziness, or a slow-moving animal. It's not like they even SOUND alike.

How can she be an unhappy writer writing a Mary Sue?

She's a GAWTH, y'know. It's a part of WHO SHE IS, being so vewy unhappy despite being a bestseller with people rushing around to cater to her whims. Being a Great Gawth Artiste means being so very unhappy and bored and depressed with the world...

Oh wait, I'm channelling my twelve-year-old neighbor.