Yeah, that Doro-something guy technique was perfected for generations, so like, what, 2000 years? 3000 years? I mean, 100000000 years of training doesn't even come close to that, I agree.
They are trying to make it as if he have no cheat. He is strong not because some random stuff, but it was because he trained hard for 100.000.000 years to the point of almost falling into insanity...
Yeah... not really... i mean that button, in and of itself, is already a cheat for giving him the opportunity
So he lives in that blank world, by himself, with no human interaction whatsoever but he only start to become insane after 1000 years? bruh, human minds aren't that durable.
Yep, he was so strong that his slice attack turns into hammer strike with a lvl 999 knockbock...SERIOUSLY? A sword htting a human flesh but it only push the enemy? With so little area of surface a sword has, no matter how dull it is, it should slice that bastard in half instead of making him fly like a godamm canon ball...
I really don't think being in isolation for that long has no consequence. He should have probably started talking to himself at some point, and lost his mind.