[Skin Concerns] HELP! Constant dull and dehydration skin and nothing works? Should I see a derm?

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Up until a year ago, I had plump, dewy, and clear skin. But now I look very dull and dehydrated constantly with regular pustules and PIH. I'm getting lines under my eyes and around my face, dull and flat complexion, and terrible dry and dehydrated skin. I've used a bunch of actives (AHAs, BHAs, vitamin C, humectants, occlusives, etc) and I've managed to treat my acne but the dull, dehydrated skin hasn't changed. I've taken out all actives yet I still suffered from the same issues so I don't think I have a damaged moisture barrier eitherIn terms of my health, I have lost some weight and in general have a low appetite but it's been like this my entire life, so I don't think it's the cause. My doctor (GP) thinks due to my mental health issues so they told me to just moisturize more often, use a humidifier, and take vitamin D supplements, yet I still wake up every day looking with skin drier than a desert and casket ready.Current routineAM-Hado Labo (HL) HA toner-Laneige Cream Skin-Dr. Jart Ceramidin Cream-CeraVe Healing Ointment all over the face-AHC Sunscreen (SPF 50)PM-Hanskin PHA Cleansing Oil-CeraVe Hydrating Cleanser-Neutrogena On the Spot Treatment (BPO @ 2.5%) x2-3 times a week-Paula's Choice BHA once a week (not on same night as BPO)-Hado Labo (HL) HA toner-Laneige Cream Skin-Dr. Jart Ceramidin Cream-CeraVe Healing Ointment all over the face​I'm planning to incorporate the Hado Labo Premium lotion, urea based moisturizer, and vitamin C to treat my dehydration but I'm not that optimistic as I've used some of them before with no results. Please send help!
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Submitted by _cnz_