God forbid the majority of isekai protagonists aren't bloodthirsty psychopaths.
Are you daft or somethin?
Who said about being bloodthirsty?
Did you read the past chapters? AT ALL?
For one in this case.
The woman the MC is fighting against (and her family in extent) is CLEARLY abusing her power for her own gains. And to hell with the lives that she'll ruin.
The MC was not going to kill her to begin with. Just punish her and remove her magic from her. AKA removing an extremely dangerous weapon from the hands of someone who is brandishing it around left and right haphazardly without a care in the world, just because she can.
So, did you get it?
Punishing someone that tried to hurt you without killing them ≠ bloodthirsty psychopath.
And that would be tame as all hell since she would most definately survive.
The same can't be said about the imploded singularity, or Emilio whom the MC had his golem bite in half.
But then again those two were male and didn't enjoy the benefits of having big tits to protect their lives.