@cinnamoncookie lol I think I found it. If I'm not mistaken, it's this one, Silver Plan to Redo From JK https://mangadex.org/title/44174/silver-plan-to-redo-from-jk
Well, after binge reading it I can definitely see why you like it more and I can't disagree. It seriously made me feel choked up from emotion on so many occasions that I even cried at times.
The most surprising thing about it was the reason behind the protagonist's actions and if I was coming from reading a manga as great as that, I too would be annoyed at the mc's lackadaisical approach to change from here. But since I haven't, I'm not annoyed because I know for a fact that people change for the dumbest reasons.
Also who knows, maybe we'll get an arc where she'll have to face the fact that even this change won't make him like her
(I can already see some foreshadowing)