Bro this man is actually so freaking dedicated to fixing his past mistake. He knows he was 100% in the wrong (welp that that ass brother too obviously duh) and is working hard to fix it. Like this is a rare manhwa were the top actually is THIS amount of remorseful. Also (Spoiler!!!) he was actually ready to himself without Sejin's knowledge. It was not a stunt to gain his pity no. He actually hated himself enough to want to die after Sejin is in a stable condition without him in this life. Like this is the maximum amount of apology a man can give. He is literally so freaking powerful no one would blame him in any way if he didn't feel remorseful (obviously this is VERY wrong). But obviously he does cuz he loves him THAT MUCH.
And ik very well that people yapping about his past actions and how he is absolutely unforgivable will eat up a plot of same setting if the Alpha did just a few chapters of chasing lol. There are many examples but I won't mention cuz it might incite rage in some people ヾ(❀╹◡╹)ノ~