Kinda sad about the implication that this is as evil as it gets. If delighting in my being a mild jerk is what's considered to be evil, those good characters are going to be an unbearable smattering of cotton candy and butterflies.
Can't disagree with you, but probably that is as far "evil" they could make it without making thoughtful "villains" which would take all the spotlight from the custom PC's story, if it's even going to be chiseled (the elven mage Solas from Da:Inquisition and like).
We'll get a relatively simple good-meaning character in ranger Minsc, but I can't see how it will correspond with the flexibility of party building where you have a backup idealistic/altruistic character for every major role in case you need some not self-centered folks in your party. If there are only 3 companions remaining, 1 of them being a ranger, for example, we are left either without cleric, wizard, or rogue role (or more than one). And stuck with whoever irks us. With the notions of Karlach going paladin, it looks even worse in that division (2 melee/probably Strength-based characters (if they still go with a canon Minsc route and current Karlach's examination showing Str-based build) could easily work together n the battlefield, yet break the party balance. Looks like an oversight to me, not a design choice (which would be trolling a certain type of players).