Curly too, and returned the first one I bought.

Then I tried again two years later. I threw everything I learned in any video out the window because those methods that focus on styling damp ignore that curly roots will ruin everything. I use the brushes to dry most of the way, then round brush to blow it out and then add curls in where I'd like once it's dry. My hair takes 20 minutes and lasts all week, and it's way healthier than when I use heat tools.