I'm not sure if my opinion is right, but these are my thoughts. Feel free to share your thoughts too.
But isn't the root of all these things is Rosemund. He was blinded by his trust (or love?) to Rosemund that he was brainwashed and tricked by Rosemund to plan these things. Do you get my opinion? I think despite all these things, he's still redeemable and that the Queen can slap him some reality of what Rosemund is doing, (and from the current chapters, she already did) and save him from repeating the same mistakes that the previous empress did to him so they wouldnt make the same mistake to their children. I still hope and believe in the spoilers that I've read somewhere, that Rosemund is the infertile one and that they will have children of their own.
I started the webtoon not liking the emperor, but somehow in the latest updates, I sympathize with him. I'm slowly starting to pity and understand (and like) him. I feel like he's just another human suffering from mental illness. Unlike the other webtoon (which is somewhat similar to this, Remarried Empress) where I can't really seem to like/understand Sovieshit.