I think him having to deal with her family, who care more about a person's character than their money, will change him. He has to get all of their permission first, and they all currently hate/dislike him because he's tried to buy their love instead of showing he's a good person XD
but he's already somewhat won them over by acting fake asf, esp the mom it's not that they believe he's a bad person, they're reluctant to marry mc to him bc they respect their daughter's wishes when she says she doesn't want to marry him (they have other reasons like status and overprotectiveness but neither of those root from them thinking he's a bad person who needs to change)
like I feel like the plot is brushing past fl's trauma too fast. ml doesn't seem to seriously consider her feelings and the plot just allows that and I'm afraid it's gonna progress without actually hitting the root of the issue, ml's selfishness and toxicity and how that is not endearing or cute