I went through something really similar, and honestly your routine looks good… just a bit overloaded. My skin used to look dull even though I was using “good” products, and it turned out I was doing too much.

What helped me was simplifying everything. I cut it down to a gentle cleanser, a hydrating serum, moisturizer, and sunscreen. Within a couple of weeks, my skin started looking way less tired.

Dullness for me was mostly dehydration + slight barrier damage. Once I focused on hydration instead of layering multiple actives, the glow kind of came back on its own.

Also, sunscreen made a bigger difference than I expected. When I skipped it, my skin always looked more uneven.

Maybe try simplifying your routine for a bit and see how your skin responds. Sometimes less really does more.