Aeroc set up Raphiel's and his child's murder...he's just as guilty and full of sin as Clough. Clough just directly did the damage with his own hands. I'm not one for revenge in such a manner, but everyone seems to forget that none of this would have happened if Aeroc hadn't been a jealous, possessive and arrogant man who decided it was the right thing to do to pay some thugs to rape a pregnant omega. We garnered sympathy for Aeroc because we saw he had genuine remorse for what happened. We can't say the same for Clough because he was too angry and full of guilt over Raphiel to admit that he could even remotely like Aeroc, so he never even accepted his own feelings and therefore couldn't move forward in the same way Aeroc had. Regardless, they both hurt each other immensely, but neither is innocent. The only innocent ones are the children, Raphiel and his unborn child.
According to what I have read in the comments, this kloff is not exactly the same as in line 1 (literally) plus he hasn't done anything to Aerock, it turns out that he has not done anything to Aerock.
Spoiler--------------------------------------
According to what I've read in comments, there is a third timeline, and that's where the torturer Kloff arrived, the one that has all his sins in his memory, that's the Kloff that made Aerock suffer horribly, but he won't meet the Aerock of his timeline (1) since that Aerok is in this timeline (2).
Yes, he is not the same person. He has been "reset", for lack of a better term. He gets glimpses of his other life with Aeroc, and echoes of the feelings from there, but is wholly a different person. This Clough didn't do those things. It was a Clough in a parallel universe/timeline. Each season deals with that. Aeroc has his memories of the other timeline in this one but I'm not sure if he will in the third reset. I'm not even sure of the manga will do season 3 because of how dark the 3rd reset is and they might want to end on a happy note. Who knows, though.
Not even ten thousands incarnations could atone klopp for his sins.
This is the part of omegaverse that i hate the most, just because ur supposedly “fated pairs” you keep on going back to the person that hurt you and hate you the most.