50% of it is smut. There's a story in it, a good one. It would be way better without the unnecessary add of a dozen chapters of backstory with grooming of a young child and random incest for absolutely no reason. The story would have been perfectly fine without it, with an adult dragon in the flashback and a perfectly normal bad guy without having to add weird incest reasoning to it.
If the chapter names where like this
Riding an ent
Riding a dragon
Riding a turtle dragon
....