What shampoo do you use//recommend

So I've been switching from shampoos and conditioners for years. I've tried expensive ones like Redkin that didn't work. I've tried mid range like Onyx and Aveno shampoo which really messed up my hair. I've tried Dove, Garneir, L'Oréal, treseme (which is the worst for me) herbal essences, patene which is also terrible like treseme and suave. I haven't tried Aussie yet which I might try. What do you use and recommend? I have straight thin brittle hair.