IMO go back to basics. What are your hair properties, what are your dew points/ humidity? Do you have harder water/ go swimming, have you chelated lately? How did your hair get so bad in the first place, is it inexplicable or down to heat styling, bleaching/ dying, sun damage? Is some hair beyond saving, do you just need a trim?

Is that Komaza's new formula protein strengthener, with the aloe and behentrimonium? What do you mean by 'sliding right off your head' and which conditioners have you been using - leave in and deep? Have you tried coconut oil soaks on dry hair, if so what does that do for you?
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond/ fractionated coconut oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Au Naturale styling gelee
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect