My hair loves protein but my scalp isn't a huge fan

Whenever I use a protein treatment, my hair comes alive but my scalp feels quite itchy and sensitive. The protein treatments I've tried are the DevaCurl Deep Sea Repair and Shea Moisture Bamboo and Maca Root Resilient Growths Protein Masque (I prefer the Shea Moisture--it smells better and gives me much better results). I've also found that skipping out on products without protein leaves my hair kind of limp and squishy, so I'm not sure what to do here. Product recs, application methods, and your own experiences with protein are much appreciated!
Current 2B/2C Routine:
Cleanse - NYM Curl Talk Shampoo or NYM Clean Freak Cleansing Conditioner
Condition - Elucence Moisure Balance Conditioner
Treatments - Olaplex (step 3) or Elucence Moisture Repair Treatment
Style - Briogeo Rosarco Milk Leave In + AG Re:Coil
Cleanse - NYM Curl Talk Shampoo or NYM Clean Freak Cleansing Conditioner
Condition - Elucence Moisure Balance Conditioner
Treatments - Olaplex (step 3) or Elucence Moisture Repair Treatment
Style - Briogeo Rosarco Milk Leave In + AG Re:Coil
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Cleanse - NYM Curl Talk Shampoo or NYM Clean Freak Cleansing Conditioner
Condition - Elucence Moisure Balance Conditioner
Treatments - Olaplex (step 3) or Elucence Moisture Repair Treatment
Style - Briogeo Rosarco Milk Leave In + AG Re:Coil
2B/2C, fine hair, low density, mixed porosity, protein loving hair
Current products:
Hair strand thickness: medium/coarse
Density: thick
Porosity: low at roots/normal mid-shaft/high at ends
Sensitivity to protein: no
Cleanse: DC Low-poo
Clarify: Build up buster, Malibu-C Un do goo
DT: DC Melt into moisture, Curly Hair Solutions Pure Silk Protein Treatment, occasional fermented rice water
Condition: DC One Condition Original and One Condition Decadence
Style: DC ArcAngel, DC UDG, Curl Keeper Original, Jessicurl Confident coils, Spiralicious, Deva B'leave in
I had a bad reaction to the Shea Moisture Coconut & Hibiscus. Took almost a year for my scalp to get back to normalish. I tried the SM Shea Butter line and it was ok - but while it didn't cause problems, it wasn't as good for my hair as the Coconut & Hibiscus. Tried the Mafura/Manuka line and that was a little better but still struggling. It has coconut oil in it as well so I was leery of it at first but apparently not enough to matter. I can mix some of the remaining Coconut & Hibiscus with it and I can tolerate that, but if I use too much (of the C&H), my scalp gets irritated again.
The hair masque in the Mongongo/Hemp oil line (which I left in for whatever it says on the label and then entirely rinsed out) gave me back some curl and lots of body/volume. But still uber dry and lacking curl (compared to what it used to be) and definition. The very first treatment with the Manuka/yogurt protein treatment left my hair moisturized, TRULY moisturized, for the first time in decades. My hair is soft, the curls are way better, and I've got definition. Still have a little way to go but LOTS better.
After the Coconut-Hibiscus debacle, my scalp remained irritated. It got better but was still messed up. Then I started oiling my hair with hemp oil. NOT CBD OIL - regular old hemp oil I got from the grocery store. Not the refined stuff that has no odor, the stuff that hasn't been processed and is green and smells like a cross between dry grass and hay.
I'd been using it on my hands for some time - I get contact dermatitis a lot from cheap soap they use in various store bathrooms. I used to have to use a prescription cortisone cream for that, but one day I got desperate because I had that rash on my hands again and rubbed some hemp oil on it. It cleared it up right away. Since then whenever I get that itchy feeling on my hands that means they've come into contact with whatever it is I'm allergic to, I rub a small amount on right away and it not only stops the itching, it never ever ever gets to the actual rash stage any more.
Once I started using the hemp oil on my hair, my scalp got a LOT better. Now I make sure to rub the hemp oil into my scalp. NO MORE DRY ITCHY SCALP.
I've been using the hemp oil and just leaving it in between washes (but then I'm retired, living in the desert with my high porosity hair, and don't have to go out where people can see me, LOL!) It helped my hair AND my scalp. Maybe some hemp oil treatments are in order to relieve the irritation? I can't say how long you NEED to leave it in for it to help, but it sure hasn't hurt my hair. It's also not greasy in my hair - seems to soak in really well. You will have to wash it out.
I used to use almond oil on my hair, but the hemp oil is less greasy and seems to have a stronger positive effect on my hair. I still use the almond oil sometimes but mostly hemp oil now. I tried sunflower oil as that is supposedly "better" for hair, but it left my hair sticky and gross. Won't use that again. YHMMV (Your Hair Mileage May Vary).
FINE
High density
???? Porosity