Welcome! Which country are you in? It would be useful to chelate the ends of your hair to remove any hard water deposits, you can get a swimmers or chelating shampoo or you can try a vinegar/ citric acid rinse. This may help soften them up somewhat.

Proven beneficial ingredients for colour damaged hair include coconut oil, hydrolysed proteins, ceramides, 18-MEA and panthenol. You can use pure coconut oil and gelatin (hydrolysed protein) from the grocery store for a deep treatment or purchase a regular product.
Ingredients Commonly Found in Hair Care Products

If you are in Europe Schwarzkopf Gliss (Kur) ultimate volume conditioner contains hydrolysed protein and panthenol
"Water, cetearyl alcohol, hydrolyzed collagen, panthenol, cocodimonium hydroxypropyl hydrolyzed keratin, hydrolyzed keratin, isopropyl myristate, behonoyl PG-trimonium chloride, citric acid, VP/VA copolymer, phenoxyethanol, behentrimonium chloride, sodium methylparaben, hexylene glycol, fragrance, polyquaternium-37, dicaprylyl carbonate, hexyl cinnamal, amyl cinnamal, limonene, linalool, benzyl salicylate."

L'Oreal Elvive Full Restore 5 repairing conditioner contains ceramides, protein and a water soluble silicone
"Water, cetyl alcohol, PEG-180, palm oil, hydroxy-ethylcellulose, dodecene, hydroxypropyltrimonium hydrolyzed wheat protein, arginine, chlorhexidine digluconate, poloxamer 407, linalool, isopropyl myristate, 2-Oleamido-1,3-Octadecanediol, myristyl alcohol, serine, cetrimonium chloride, cetyl esters, BHT, citric acid, butylphenyl methylpropional, lauryl PEG-PPG-18/18 methicone, glutamic acid, hexyl cinnamal, glyceryl linoleate, glyceryl oleate, glyceryl linolenate, fragrance."
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