There is no 'one size fits all' approach, depends on your hair type/ properties and trial and error. Many of us find we can use more hydrolysed protein in the summer and less in winter. Some need to deep condition after a treatment others do not. My hair seems to do best with protein within a leave in conditioner rather than drying intensive treatments.

Have you clarified and chelated to address the knotting and dry feeling in case that is simple build up? It doesn't make sense to say your hair is dry (most mean lack of water) and too moisturised (too much water) at the same time.

The only solution to split ends is a pair of scissors. Not sure what you mean by shedding, if shedding from the roots them see your family doctor or a dermatologist. If breaking on the lengths and ends you may not have your hair properties right so not selecting the right products and ingredients.

You might consider a hair analysis from Komaza Care or Goosefootprints on Etsy.
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