Some people's hair likes certain proteins better than others. Keratin is one that seems to be widely tolerated. So you may need to do some experimentation, but it sounds like it wasn't a complete bust. I have never tried a home-made protein treatment, but someone else may be able to tell you... some treatments need a deep conditioning afterwards, especially if your hair is on the coarser side. I never do that because I overcondition so easily. I was using Repair Me a lot, which I do like, but recently I've had great success with Colorful Neutral Protein Filler mixed with water. I don't even DT after that. If your hair starts to feel strawlike and extra frizzy, that means you overdid the protein.
2b/c wavy modified CG since July 2012
medium texture, normal porosity, normal elasticity
hair likes protein, doesn't like oils, easily OC'd
low poo: JCHCC, CJGCS
RO/co-wash/LI: YTCarrots, DB Pumpkin Seed
stylers: a bunch of stylers that are all pretty much the same (KCCC, UFDCM, CRCM, CKCJ) or ArcAngel if I need more hold
DT/PT: CJRM, CNPF