Yo, man lived for a thousand years and still could not call a girl cute. Then after 30,000 years he can't even look at a woman's body. I can see why there is not a romance tag this man is either a monk or socially inept to a whole new level.
Again with this plot, can we please stop this. If you are going to set up a scenario so clearly for revenge why make it about a "peaceful life?" You can do that with out all the extra drama. I guess its just to show how benevolent the MC. But honestly it just makes them seem weak willed when...
I haven't read the story yet, but the plot summary sounds like everyone betrays the MC for no reason. MC looks down sees he has the most dangerous weapon in history and shows them a uno reverse card.