The problem I'm having with being/sounding repetitive is that I want to "follow the example" on tragedy stories like the abnormally common oneshot fics where Ash/Pikachu dies so I can reproduce on this specific part of the story. But when I go notice, just like you mentioned, I red too many of them and maybe started making this part sound the same as those oneshots.
In short, I'm having trouble with knowing how to write a good tragedy chapter. <.<