I mean, sure, you've got the occasional world ending baddy from time to time, but on the other hand, the fundamental idea behind most eastern supernatural powers is that your strength comes from within.
MC is special. Nobody denies this. But MC rarely does anything literally nobody else could do, at least in theory. DBZ? Sloppy writing aside, anyone could keep growing stronger pretty much without end. They just need to actually put in the work. Krillin. The little bald midget that the villain of the week smacks down without fail? Strongest human on Earth. Literally invincible to anything that isn't a race of super warriors or androids. His getting hurt by a bullet is meant to show us how far he's fallen.
Hunter x Hunter? Nen. Some people are literally born with superpowers and more life energy than they know what to do with. But even the lowest nigger could train hard enough to be invincible, at least in theory, and harness the power he has inside him.
IRL? Train all your life and three guys with sticks can still beat you to death.
tl;dr: Pvp is unbalanced. Plz raise level cap and ban 2v1.