He's very judgmental of himself, this is a truth. He's going through a lot right now and most of it involves his absolutely shattered self-confidence. He doesn't think he was/is right about anything but he also knows it's wrong to let himself be clouded by any hatred, whether it's toward himself or others??? He's constantly trying to find judgement for himself.

And Jaime helps because he's proven to be level-headed and has a sense of justice and fairness that Ken still SO ADMIRES but he also happens to be someone uninvolved who's not entirely unbiased but he has a good bias toward everybody Ken knows. That is to say he's friends with Shinji and is being friends with Ken too and he's latching on to people who won't take sides. You're a bro, Jaime.