There may be some extremely rare and out - of - the - box fanfiction that might explore such a dark concept, but it's not a mainstream idea. The Tolkien's works mainly depict Thranduil as a protective father figure, though he has his flaws. Legolas is shown to be loyal to his father and his people. So, this 'abuse' concept seems more like a deviation from the normal perception rather than something based on the original themes.
It could also be a misinterpretation of the characters. Maybe the writer saw some of Thranduil's sternness or his actions in a wrong light and decided to take it to an extreme of abuse in their fanfiction. Another possibility is that they are trying to explore a very dark and angsty side of the relationship, perhaps to show how Legolas could grow and overcome such a difficult situation, but this is still a very unorthodox approach.
One plot idea could be a coming - of - age story for Legolas. Thranduil could be teaching him important skills like archery and forest survival. Another could be a journey they take together to a far - off land to solve a mystery that threatens their realm. Or perhaps a story where Legolas gets into trouble and Thranduil has to rescue him, which in turn teaches Legolas a valuable lesson about responsibility.
I'm not aware of any specific 'legolas abused by thranduil' fanfiction that can be recommended. Fanfiction often varies greatly in quality and content, and this is also a rather dark and unorthodox concept. It's important to note that such themes might deviate from the original positive portrayal of the characters in the Tolkien lore.
One idea could be a story where baby Legolas shows an early talent for archery, and Thranduil is both proud and protective. He starts training Legolas in secret, away from the prying eyes of the court. Another plot could involve baby Legolas getting lost in the forest near their kingdom. Thranduil panics and launches a massive search, during which we see his deep love for his son. A third idea is that an old enemy targets baby Legolas, and Thranduil has to use all his wisdom and strength to keep his son safe while also teaching him about the perils of their world.
Thranduil, with his own great archery skills, would influence Legolas in many ways. He might take Legolas to special archery ranges in the forest. There, he would teach him how to aim at different distances and in various lighting conditions. He would also instill in Legolas the importance of patience and focus when it comes to archery. As Legolas grows, Thranduil would gradually introduce more advanced techniques, such as shooting while moving or shooting in windy conditions.
Growth and coming - of - age is another theme. Fanfictions may depict Legolas growing up under Thranduil's guidance, learning important skills and values. This can include Legolas becoming a better archer, a wiser Elf, and more independent, all while still maintaining his connection to his father.
One common theme is the bond between father and son. When they are hurt, it often tests and strengthens their relationship. For example, in many fanfictions, Legolas will do everything he can to protect his injured father Thranduil, and Thranduil will show his paternal love in his concern for Legolas's well - being.
One great Legolas and Thranduil fanfiction could be one where they go on a quest together. It might explore their father - son relationship in a new light, like how they communicate and understand each other better during the challenges of the quest. For example, they could be searching for an ancient elven relic and along the way, they share stories from their past, which deepens their bond.
One common theme is family bonding. Writers often explore the relationship between Thranduil and Legolas, showing how Thranduil imparts his wisdom and values to his son. Another theme is Legolas' growth and development, from a little elfling to the strong warrior we know. Adventure is also a popular theme, with them going on quests together or Legolas learning the ways of the forest from his father.
One reason could be a desire for a darker, more edgy take on the characters. Some fans like to explore the 'what if' scenarios that are completely different from the original narrative. They might want to add more conflict and drama to the relationship between Legolas and Thranduil.