While its generic trope of the isekai protagonist helping everybody in need, even those that have wronged them at least the author went out of thier way to try and justify why the protag is helping this asshole by 0resenting the concept that the ass has teammates that have family, thereby having the protag feel obligated to help so that the other party members of the the assholes family dont have to suffer the same fate he did.
While it doesnt really justify and continues the trope of isekai protag helps everyone even 'assholes' it does go out of it's way to try and justify the protags actions which is more than can be said for most isekai series