He ends up raping the sword saint "in revenge" for opposing him when, objectively speaking, had every reason to believe he was an awful criminal because every action he had taken in front of her looked shady as shit. Up until that point, he had respected her as one of the few people in the world with proper morals, and in fact she was demonstrating those exact same morals but in a way inconvenient to him. Prior to this, I was all for him treating the ex-princess like shit. She was the primary cause of all the pain he went through, so power to him. Slightly less enthused when he wiped her memory and it turned out that in nature she was actually pretty sweet and it was her upbringing that turned her into an ass yet his view of her remained the same, but I get it, grudges are tough to get past, we still good. Then we get to the bit with the wolf people, where he essentially blackmails an innocent wolf-person (who to be fair, is already a slave at that point) with saving her tribe into becoming a disposable piece for him. Yeah, I get it, she was already a slave lacking basic human rights, and why not use the situation with her tribe to earn her loyalty, sure. I personally am none too comfortable with him not even acknowledging her as an individual with feelings, but as a disposable weapon, I feel like he could have bought her loyalty with that tribe-saving thing without treating her as a toy/tool, but that's slavery for ya I guess. I'm uncomfortable but carry on. Then we get to the part I left off at, where he did some shady sh*t to make the Sword Saint think he's a dangerous criminal, and then when confronted he beats and rapes her. No, I get it, he's a selfish a***ole on a power trip willing to fabricate the reason of "revenge" to punish anyone foolish enough to stand in his way. He's a scummy MC, and this series is a domination fantasy of him conquering and abusing the various heroines. I'll stick to my p***y MCs, going on about friendship and kittens and what-have-you... Or at the very least ones who stick to justified vengeance.
So turns out the church is mega-corrupt (we already figured that) and they convinced the Holy Priestess that the only person she's allowed BY GOD to be romantically involved with is the Hero, and so because the Hero was female in MC's past run she ended up turning into a traitor boss encounter all because she was thirsty AF... Perfectly reasonable. Sexual frustration will f**k you up, man. That being said, here's a prediction: MC, now confident that he knows the priestess's motivations for why she went psycho last run and everything that makes her tick, will show her indisputable proof that she's been bamboozled, thinking he can make her move on with her life, but in her eyes his actions amount to saving her and she falls for him for real, the very thing he was trying to make her not do.
when it came time for his first ever battle, the author managed to extremely skillfully convey so many things: the claustrophobia of being stuck in full armor with vision narrowed by the helmet's visor, the stress of being in a life-threatening situation, not to mention being in the most dangerous position that shoulders the lives of his comrades as well, the way that high-stress situation can limit one's ability to think and narrow one's perception of their surroundings even further, the added stress of being forced to take another human life for the first time... It's very rare that I get sucked into a novel but the author and translator managed to get me to the point that I knew exactly how he felt, I felt like I had experienced everything he had.