CH15 - wow he was really trash back then

I won't defend his past actions but his bitterness and being bad was an accumulation from all of his experiences that he lashes his anger out on people that has nothing to do with those, his grandma blaming him why his mother died, an abusive home, the person who he thought would help was using him as well(and making empty promises and the person who took advantage and manipulated him when he was desperate), and also the fear of being replaced.

He wasn't born as bad person, he's just a product of his experiences. (Also the fact that the person who found him first at his lowest point didn't help. And he sees that person as his sort of a god. It took him to the point when he realized that he was a scum that when he needed him the most but he abandoned him, and realized which people who truly cared for him)

So I personally don't think him wanting to do good to those people he wronged is out of place or sudden...

These bl fans really can't handle recarnation manhwa it seems . I saw their reaction same on other bl manhwa with recarnation . Here in straight manhwa we would be rooting for villianess who killed Male lead for another man we are unhygine about it too . As we treat as better option life which Female/male lead choose rather past life . This mahwa too its a possiblity of his action which had bad ending so he changed from Day 1 to make himself better person protect others whole if it was straight just saying he would be going around killing every person who was bad to him in previous life

I mean nearly all the manhwas you're talking about are garbage for a reason . . . This had some intrigue but fell into the same tropes and pitfalls and thus also fumbled along the way