Desperate to die was reason shin said he saw his young self in ryujin which ryujin proved him wrong ryujin might wanted to die but never when he gets escape root unlike shin ryujin is far more strong emotionally.... He never torture someone like he did to ryujin u will read further how disgustingly he actually torture someone's since he fell in love with ryujin at first sight he decide to use him and want to die by his hand as salvation..... That's why he feel before men might have impacted ryujin life but shin feel hatred and revenge are strongest emotions than other love that's why he tortured ryujin this way

I don't get it, he sees his younger self in him because he's suffering so much but he's the one making him suffer so wtf.
I'm still on chapter 25 and I can't understand why he would torture him so horribly for information that I don't think was ever used so far.