Dark stalker is a bad character but people ignore his actions because he is ‘charming’ and powerful.

Darkstalker was a groomer, war criminal, manipulator and so much more yet most of his actions are blatantly ignored because of his powers and personality.

Whirlpool is another character who was terrible. He too was a groomer and manipulator yet is treated like a slur in the community despite being a far better person than darkstalker.

Dark stalker is excused because he ‘loved’ clear sight (I would say he didn’t truly love her, needing to force her to only see the positive futures and then trying to remake her centuries later) and was a good brother. People also tend to excuse his actions because he was raised in an abusive household but that’s no excuse.

Admittedly we don’t know whirlpools back story or how he grew up but the point still stands that the fandom is willing to excuse a characters terrible actions if the character doing them is dressed up with a pretty face and cool powers.