Your final shampoo may have had hidden 'cones in it... this happened to me when I first started CG, and I had to start over with a sulfate wash.
If it didn't, you may want to start paying attention to ingredients in your products. For example, many curlies find LALSG drying because it has both glycerin and protein. You may be sensitive to one or both of these ingredients, but the only way to tell is through experimentation. Maybe try a gel without these ingredients such as Herbal Essences set me up or Aussie instant freeze.
Have you tried deep conditioning? When my hair is brittle, I use a deep treatment like CJ curl rehab or JC deep treatment, and it brings my hair back to life.
My hair: 3b, corkicelli, medium porosity, medium texture, medium/thick density
Co-wash: DevaCurl NoPoo
Rinse-out: GVP Conditioning Balm
Leave-in: KCKT, Suave Naturals Coconut, or my rinse-out!
Gel: SS FHG (my new HG!!)... I also like HESMU, AIF, CJ CQ, BRHG, CJ PP and the occasional LALSG
CG and loving it!