what she means:I understand that Kaneki is not free of flaws and has made many questionable decisions throughout the course of the series. But we can't deny the fact that he's just a guy whose life has been utter shit even prior to becoming a half-ghoul. No one deserves to have their life spiral out of control like that just for wanting a quiet book date. All I want is for him to find peace, and because it feels like the entire tokyo ghoul universe is actively depriving him of that, the easiest way I can vocalize this feeling is through using an overused expression.
When someone calls your favorite author out on their problematic behavior, no one is asking/telling/forcing you to loathe them and their writing for all eternity. It is not an attack on you. They’re just asking you to acknowledge the problematic behavior for what it is.