Not trying to defend his actions but i think you forgot that he did care—Until Sejin gave the usb thingy info idk to his dad. Thats when he started to despise him + when he thought that Sejin willingly slept with his brother.
True they lack communication like most of these manhwas do but yeah ido did care he was starting to let himself fall in love with sejin and actually take their marriage seriously until sejin decided to betray him bc he let himself be gaslighted by the family who just took him in to use him so everything ido felt when he found out was valid he was betrayed he didnt know what to do bc they're married and when the brother r*ped sejin he thought sejin slept with him willingly bc sejin said so too they never really clarified anything with e/o ido only ever found out the truth when they bonded and sejin never said anything thats why when the reincarnation happened ido made sure that they talk to e/o before they sleep bc he knows thats what they lacked in the past
The only thing that keeps me from wishing they'd separate for good is the thought of sejin suffering because of the bond. Ido, redemption doesn't mean erasure of the fucked up things that you do. That's why their story feels more like a moral dilemma for me. Would you forgive a person knowing they still haven't done the horrific things they've done in the future? Or in their case, past?
What Ido had done to sejin pre-reincarnation is nothing more than a mistake. It's his choice to rape him, it's his choice to be abusive to sejin, he chose to only look at what he want to look in their alleged marriage. He's really a bitch. Cuz what do you mean he only cared after his death lol. If the reincarnation didn't happen, there's no way to redempt.