Centellian Madeca Melacapture

This is the Madeca Melacapture Ampoule I am using for freckles and blemishes.

My skin is dull and doesn't become bright and clear no matter what I use, so I don't have high expectations; I'm just applying this because others say it's good.

Perhaps because I've been applying it consistently, it seems to be fading slightly. Should I be satisfied just that it isn't getting darker? I've heard that dermatological procedures can make the skin more sensitive, so I'm not sure what to do. I would appreciate any valuable feedback from users who have seen results for melasma and blemishes.