TurtleMe has the courage to let Arthur fail. Not "fail forward" where he loses a battle but gains a new power. No. Real failure. Loss that reshapes the entire geography of the story. The moment the "beginning" ends and the "after" truly begins is one of the most gut-wrenching shifts in modern web fiction.
The Tragedy of Growing Up Twice: Why The Beginning After The End Hurts So Good beginning after the end
Here is where TBATE separates itself from the pack. In most isekai, the protagonist’s past-life skills are a gift. In TBATE, they are a curse. TurtleMe has the courage to let Arthur fail