I do not feel sorry for Baili Shen. He killed too many of Yueluo’s past reincarnations (ultimately leaving Tong’s reincarnations unhappy) for me to just wish him a happy ending. He’s utterly selfish and never respected her wishes until he was forced to by Yueluo.
Now here he is hurting the sister, the person who still cares about him despite his cold treatment of her.