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, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.