Evil is evil, regardless of degree, according to Geralt. So something already being evil, a negative trait, having more evil (another negative) creates a positive.
So evil exes = Evil-Evil = Good
So Scott was just beating up actually good people?
This would require both parties to have high level of maturity (something we can't calculate with science) it can happen, I think you would have a easier time finding a honest politician
Thank you froggy baby, but really it only takes one thing. Both parties have to consistently prioritize the needs of their child over their own needs. There is no excuse for cruelty and pettiness when it can cause lifelong harm to an innocent.
So evil exes = Evil-Evil = Good
So Scott was just beating up actually good people?