I expected more from this product

I purchased this product thinking it would be as good for my hair as shampoo and conditioner, but it was not good for me at all. In my case, my hair with the shampoo and conditioner, its hydra hyaluronic acid formula, has changed much better. but I feel that after using this serum, my hair is heavy and I feel like I have a cream on my hair. I used it after showering, after drying my hair a bit with the towel, and it dried in the open.     

Translated from French by AWS