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.
fine, thin, normal/(low?) porosity. Mod-CG. Usually I can't co-wash more than 1x a week, & sometimes I have to use T-Gel in rotation due to scalp issues.

Co-wash: VO5 Volumizing
Poo: Giovanni 50:50
RO:TN, Nexxus Youth Renewal, Alba Coconut
PT: gelatin PT, ION EC
Stylers: Giovanni mousse, TIGI Curls Rock amplifier (a-cone), Curls Rock Strong Hold Mousse
Gels: SCC spray gel