My hair LOVES protein, too. It never met a protein it didn't like! I do at least one PT a week and use a lot of products with protein.

Since coming onto and learning about products, technique and getting the protein/moisture balance right, my hair has gone from winter wavy/summer 3a to looking like my signature picture all year around. Could be, you're a curly waiting for the right care, too.
3a (Corkicelli), highlighted, fine, low porosity

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me, Aloe Fix