Just can't do it. Had a crappy enough childhood in real life, it's just hardwired in me that even the virtual kids need hugs not thugs.
You know what? I can respect that. Play the virtuous route without shame.
...which can lead to another form of more virtuous amusement. Get wards / hostages
out of a sinful/abusive/heathen liege's court and raise them to be virtuous.
Due to how the CK3 child personality trait events are rolled (a strong bias towards the guardian's traits, and away from the traits opposite of the guardian's traits), children tend to take after parents (or at least guardians). Therefore, evil rulers tend to raise evil children.
But you can stop that! Break the cycle! Save the children! Educate them to your virtuous traits, to your more enlightened culture, and so on. Have the best revenge / punishment of all- wards who love you more than their own wicked fathers. Adopt them as able- either through the hostage event that can spawn from being close to the child, and/or through Noble Adoption tradition.
This can be especially fun-ish if you deliberately play the culture game not for min-max development or conquest, or play a fundamentalist religion where you just reovke titles of unbelievers, but to spread a virtuous elite caste and a more tolerant religion.
Set up a legalism-legalistic tenet-tradition combo so that Just becomes both a huge super-trait and more common.
Add Charitable tradition so that kids of the culture are more likely to become Generous or Compassionate, and then add Islamic or Christian Syncreticism as a tenet so that both of these traits will be virtues.
Add Pacifism as a third tenet, so that you can't Holy War at all, but holy legends can convert neighboring realms. Add the Forebearing tradition so that children are more likely to be Calm (the virtue) or Patient.
Assuming Christian, commit to adding feudal elective laws to whichever duchies you can, so that the virtuous rise to the top.
This can help lead to a game where instead of out-powering everyone on the back of min-maxing, it becomes a broader struggle in a cruel world to help enlighten convert and guide by generational change rather than wars of conquest.
(Shorter build concept-
-Custom Christian / Islamic religion of Legalism, Christian/Islamic Syncreticism, Pacism. Have doctrines of Pluralism, Clerical Alms & Pacification,
-Customize culture to have Legalistic, Charitable, and Forebearing, and Noble Adoption. Throw in similarly thematic traditions- like Ritualized Friendship, or Beacon of Learning.
-As able, convert duchy-capitals to your ruler-caste culture, so that nobility will (usually) convert and stick to it.