Wow. So there are no actual stakes left anymore, just some quickly scrambled together deus ex machina bullshit where the MC can now time travel to overcome anything. Like shit, the only series that I think gets a pass on this kind of shit is Re;Zero where Subaru is almost completely useless, and has to suffer many extremely painful deaths and torture, plus watching the deaths of many he cares about multiple times, along the way of going through trial and error to find creative ways to overcome insurmountable odds. In this manga, the MC is decently powerful, but it was when he was at his most powerful, at his old age, that he was able to reincarnate into the past, but now, suddenly, his less powerful body suddenly has the ability to go back in time at a convenient point before everything went to shit. This manga took a steep nosedive in only one chapter holy shit.