The only suave naturals that has protein is the coconut one. Nothing in the one she listed is a protein.
I agree with doing more moisture. Get a really nourishing conditioner without silicones (biolage or GVP conditioning balm and curl junkie curl rehab are popular ones) and let it sit. Use a different RO after you co wash - Tresseme Naturals is common, or you could use your DT as an RO until it improves.
Agree also on the porosity thing. My hair is low-normal porosity & never tangles unless I have hard water mineral buildup or used an ingredient it doesn't like.
What makes you think yours is protein sensitive? I can't see your siggy if your properties are listed so sorry if this is a dumb question lol.