Worst shampoo ever

I have been suffering from hair dryness for few months. So was trying to find out a good hydrating shampoo. Mostly natural shampoo. So I went to the body shop store and was recommended to try the banana shampoo for dry hair. So I bought the biggest bottle they have.
I started using that shampoo and I felt I have bought the worst shampoo ever. It has made my hair so rough and dry instead of making it hydrated and smooth. I tried it few more times and each time I have the same experiences. I just hate this shampoo.