The sister arc ruined this series for me. Watching an otherwise chill and enjoyable mc turn into a manchild obsessed with revenge for multiple chapters all to set up his supercool elaborate revenge on his abusive sister from his past life, making her suffer in a multitude of ways both physical and mental, when he could have just killed her at any time and be done with it makes him look pathetic. The fedora didn't help.
...and everyone else just goes along with it! Even the priestess who is supposed to be a saintly good person is a-okay with everything that happens because the mc is doing it and even helps his plan along.
Then when it's finally over and done with everyone lavishes him with praise and gratitude like he's a goddamn hero.
It's like I got a goddamn fakeout with this manga. If a series wants to be an edgy revenge power fantasy be my guest, but don't spend 60 chapters pretending to be a slice of life chill series and then do a 180.
...and then after this arc it goes back to being chill, like I'm still supposed to view the MC as the same casual old dude after he spent multiple chapters acting like a wannabe Light and getting praised for doing so.