My skin texture is rough and my complexion is very dull. Has anyone tried Rivicol?

Lately, everyone I meet asks if I'm sick or if I haven't slept well, saying I look tired so often that my self-esteem hits rock bottom every time I look in the mirror. My skin tone has become dull and dark like earth, and my entire face feels dry and parched, with absolutely no shine or radiance to be found. When I run my palms over my face, it feels rough and bumpy rather than smooth, making me feel so depressed every time I wash it. I've tried vitamin ampoules and brightening essences, and I've exfoliated regularly, but the effects are only temporary; it feels like the nutrients and vitality deep within my skin have been completely depleted. Even when I apply makeup, my complexion doesn't brighten up; instead, it just sinks down to a dull, grayish hue. I want to improve my skin's fundamental condition, so I want to try Revicol. It will definitely be effective, right?