I never thought I'd say this, but I guess there's a first time for everything. This grossly overpowered main character is WAY too underpowered.
There has been some general misunderstandings in the translations of the early chapters regarding time spans, which I don't blame the translators for. However, the interpretation they seem to have settled on, which is what I'm using, is that he has trained for 100 million years. TWICE, unless I've grossly misunderstood what happened at the end when he slapped the button again. But even if he had only done it once, he's still elevated himself to a degree where his swordsmanship no longer qualifies as mortal. He totally mastered the sword. He then invented techniques, like forming shadow clones out of his own willpower and resolve, just so he could push farther. It was explicitly stated in the mini-tournament arc that what makes the sword schools so important is that their techniques are refined over dozens or even hundreds of generations to create peerless techniques. Prodigies standing on the shoulders of prodigies that came before them, etcetera. Which is why nobody who isn't from a school stands any real chance against anyone who is. That's fair, that makes sense. But even five hundred generations, which is arguably the WHOLE LIFE AGE OF HUMAN CIVILIZATION, is only a mere ten thousand years. Even if I'm generous and DOUBLE that because this is a fantasy setting, and fantasy has grossly exaggerated timelines, that's still only twenty thousand.
Pull out your calculator app and divide twenty thousand into a million. Here, I'll do it for you. That's fifty. Twenty thousand goes into a million FIFTY TIMES. So even if the most ancient and venerable king's art of manifesting the spirit of your asshole as an elemental stand so you can chuunibyou the shit out of your enemies took double the life age of all civilization to create, a million years of training is FIFTY TIMES MORE THAN THAT.
And that's just for a million years. The MC allegedly trained for one hundred million years. So a hundred times more than that. And unless the initial chapter translation was especially bad, I'm pretty sure it's implied he did it TWICE. He should be more powerful than ANYONE ELSE IN EXISTENCE. Not by a narrow margin, either. By an absolutely ludicrous degree. The MC has literally forgotten more about swordsmanship than exists the total sum knowledge present in our real, modern timeline of history.
And that's just talking in terms of raw amount of time put into learning the craft. This isn't even touching on the fact that, given what the guru and his mother discussed and implied, the MC is some catastrophe class entity that had the majority of his power sealed as a child. Which means even with no training but no seal, he should probably be stronger than everyone else alive, or else there'd be no reason to seal him and then build an entire village to raise him just to maintain the facade of normalcy.
That guy has a hundred million years of training. Twice. And the seal is starting to come off. And he's getting matched move for move by the pigtails tsundere retard that's so grossly sterotypical that having to read her dialogue makes me want to drop kick her into the shadow realm.
Get the fuck out of here. Get the actual fuck out of here. Even if he still doesn't believe in himself or understand how powerful he really is, there's absolutely no excuse for that. The mini-tournament was more honest by far. The greatest swordsmen in all the lands gathered, and he casually saw through everything they had. The only person who came even remotely close to him was the once in a generation prodigy of one of the strongest and oldest schools in existence, and she only lasted as long as she did because the MC was having fun with the fight, because it was thrilling to fight somebody who wasn't himself for a change. He was visibly enjoying himself and he wanted the fight to last, both of which are not the case here, and yet he's inexplicably being pressed harder by the tsundere than he ever was by the bounty hunter.
The MC should be utterly and completely peerless after everything he's done, and that's certainly the elevator pitch we were all given in the last few chapters. Hell, it's literally the title of the damn manga. I know people who have read the LN have said that the author basically forgets about the time guru for a long while, and the implications of it only come into the picture much later, and I accepted that. And I also know from comments made from people who have read the LN that this basically turns into a battle harem series, and I'm not horribly opposed to that either.
But if you're going to spend all this time winding me up about how the MC has more experience and skill in swordsmanship than twenty thousand times the life age of all human civilization, then it needs to be understood that I have not signed up to watch Naruto get his ass beat by motherfucking Kiba at the Chunnin Exams. Hell the FUCK no. We are DONE with the training arcs. The MC has started the story maxed out, or at the very least, he's started the story at so high of a level that no child prodigy with a metal stick should be able to so much as scratch him. The MC should be able to solo every single student AND faculty member in the ENTIRE SCHOOL.
And yet here we are. No. Fuck you. You don't get to play the underdog card, not after what the MC went through. If that's the kind of story this is going to be, then I'm out. Not because I hate underdog stories, quite the contrary, I love them to pieces, but because I'm not putting up with an inherently goofy premise like "100 million years training button" just so the guy who pushes it can get Worfed by walking sterotypes that are still in highschool. I can accept the battle harem, and the author not following up on the time guru and his apparently falsified childhood for a very long time, but the Worfing is a line too damn far. Don't wind me up with bullshit about time buttons if the lifespan of a small star isn't enough to eclipse the gap between the main character and Princess Asuka The Chuunibyou Royalty.