You have low porosity hair but it's permanently dyed? That is unusual, are you sure, could it have changed somewhat? Is the canopy possibly sun damaged, that would increase porosity there.
I would lose the propylene glycol in such high dews. There is aloe vera in the Tresemme Naturals I think and in the Shea Moisture shampoos, tho hopefully not enough to make a difference since it is washed out.
I wonder if you need a richer conditioner, not necessarily heavier. Something without humectants but plenty of fatty alcohols and a little natural oil as these ingredients can increase clumping and capillary adhesion. Oil within a conditioner base is much easier to distribute without getting the greasies than when used straight up. Shea butter can build up for some people as can cetyl esters.
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.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics