Im sorry but this argument is plain stupid,we were constantly shown jihos unhealthy coping mecahnisms such as sh through drugs etc which literally put his life at risk during his life after he left korea.And it was shown very obviously that it was not a a real relationship but an abusive one,you can see very clearly that he does not love him at all and its bc of his mental instability and sh tendencies.Did we really read the same manhwa chapters?
What do you mean it wasnt a real relationship ? It was toxic but it doesnt mean it wasnt real.
And from where do you get the information that the relationship was abusive ? It's possible it was but so far all we know is that as time passed, Jiho kept falling in his ex's priorities. I dont think he mentionned being abused. It wouldnt be a shock if it turned out to be abusive, but so far we dont know (unless i missed somsething).
And yea we can see Jiho doesnt like his ex as of right now. But Jiho himself says the relationship failed because Jiho craved for his ex's attention amd the guy kept prioritizing othet things over Jiho. Meaning Jiho liked him, but his feelings faded through years of neglect. Amd only now that he has finally decided to move on from his ex, only then does he try to get back with Yujun.
Just because Jiho wasnt happy in that relationship, doesnt mean he didnt like the guy.

Its just weird that Jiho liked the thrash guy for 6 years. And only now that its over, he wants to go bsck to Yujun as if he is the only one for him.
If Jiho liked Yujun more than his ex, he wouldnt have been craving for his ex's attention for 6 years.