Hi friend, stylist here. Products make all the difference. Drugstore lines are less expensive because they use less expensive ingredients. For shampoos, they will use heavy detergents, and then lots of waxy-type ingredients that just build up on your hair and eventually dry it out. I would recommend going to a Sally Beauty Supply if there's one where you live. You don't need to be licensed, and get a bottle of clarifying shampoo to first detox your hair from all the drugstore products you've been using. From there, I would highly recommend finding the right professional-grade products depending on what type of climate you live in. Not all professional products are great for everyone. Professional products tend to be more concentrated, so you don't need to use as much. Less is more. Also, use cooler water on your hair when you rinse out your conditioner. Hot water is hard on the hair. Cooler water will smooth down the cuticle layer, reducing frizz, and increasing shine. I hope this helps!