The fanfic could also explore the social aspects. How does the reader fit into Lestrade's world? Are there other characters who are supportive or skeptical? And how does the relationship between Lestrade and the reader change as the reader becomes more confident and healed? Maybe at first, Lestrade has to be very careful with his words and actions around the reader, but as time passes, they develop a more equal and loving relationship. It might also touch on how the reader's abuse has affected their view of relationships in general and how Lestrade helps them redefine what a healthy relationship can be.
Another thing to keep in mind is the characterization. Lestrade is often depicted as a reliable and empathetic character in the Sherlock Holmes universe. In a fanfic with an abused reader, he could be the one to offer stability and safety. He might introduce the reader to his world, which could be a whole new experience for the character. Some fics could also explore how Lestrade's job affects his relationship with the abused reader, for example, if his detective work brings up memories or fears for the reader.
One common theme is the 'opposites attract' idea. The reader might be a civilian or from a different background than Lestrade, who is a detective. Their different worlds collide and create an interesting dynamic.
Another way to find good Lestrade x reader fanfic is to ask in relevant fandom communities on platforms like Reddit or Tumblr. Fellow fans might be able to recommend their favorite stories. There could be some hidden gems that are not as well - known but are really well - written, perhaps ones that focus on a particular aspect of Lestrade's character in relation to the reader, like his loyalty and how that plays into their relationship.
One common theme is probably redemption. Keith might be seen as a source of healing for the abused reader. He could help the reader overcome their past traumas and start a new life.
There are many fanfic communities out there. Maybe check out Tumblr. Sometimes fans share and recommend fanfics there. Look for tags related to 'keith' and 'abused reader'. However, it might take some time to sift through all the posts to find the right ones.
One consequence could be a decline in the fanfic community's morale. When fanfic is neglected and abused, the writers may feel unappreciated and stop creating. Another consequence might be a loss of diverse stories. If readers don't engage properly, some unique and interesting fanfic ideas may never be fully developed. Also, it can lead to a negative reputation for the overall fanfic genre as it gives an impression of being unvalued.
I'm not sure specifically what that particular story is about as the name is rather general. It could potentially be about a character named Megatron in some fictional universe having an interaction with a reader who has been abused, perhaps exploring themes of rescue, recovery, or a complex relationship in the face of that trauma.
Often, they interact with a lot of patience. They sense the reader's pain and are gentle. For example, they might start by just being a quiet presence around the reader. They slowly build trust, like in a story where a Sans from an AU offers the reader a small gift as a sign of friendship without pushing too hard.
One common theme is healing. The relationship between Levi and the abused reader often serves as a catalyst for the reader's character to heal from their past traumas. Another theme is protection. Levi is usually depicted as a strong and protective figure, shielding the reader from further harm.