"The Grovelling is not enough "

This is comment that I always see in manga/wha/hua that has a shitty ML at the start cause I see that in some stories even if the ML try to make it up and even took years(even if it only took like 4-6 chp, I mean it depends on the authors how many years has passed in a single chapter) I still see this comment, sooo I'm asking YOU What should the ML do to be enough to deserve forgiveness and how many chapters do you think it should take?