>>535569989
Sinclair is unpopular because he isn't that interesting and the Cain's mark and the blue nigger bullshit is also not that interesting, Demian is also not that interesting and outright makes some Cantos slightly worse by simply being in them.
This would not be a problem if it was just brought up once or twice but it's very clear that KJH has a bias towards Demian (being his favorite book of the ones being referenced in Limbus iirc) which means that both Demian, Sinclair and the blue negroes get way more screen time than what most people like.
On the Contrary, look at Sonya for example, he has appeared once in the story, is barely related to N Corp and it's only really relevant for Rodya's story, yet he's way more interesting because TKT showed us that he is actually moving forward with his plans and actually having some succeses with it.