Anyone else use Chagrin Valley shampoos? Dandruff and itchy scalp related question

Ive tried a few different shampoos from them (I love bar shampoos) to do something for my dandruff which has been getting so bad since last year. It was non existent when I was washing with egg/baking soda/acv but I got tired of that routine and smelling acv all the time (despise how it smells).

So far my favorite for the dandruff is the ayurvedic herb shampoo, but its still not totally doing the job. My scalp is dry and itchy as hell and there are so many flakes :( I've tried rosemary mint, the henna one, neem and tea tree, and babassu and haven't noticed much results from those ones. Though I only used each one once or twice since I wash weekly and am very impatient.

Anyone tried some other ones that have had good results? Or even have another suggestion for dandruff? I am thinking of trying to just massage tea tree oil into my scalp but I'm not sure of the best way to dilute it.