First Deva cut 2 years ago, still have the frizz halo. What am I doing wrong?

I thought I would see better results by now. I had my first Deva cut 2 years ago. Since then I've been using all of the right products recommended to me by hair stylist. I haven't used a blow dryer in probably at least 10 years. I only straightened my hair with a heat straightener maybe 3 times in my life. No relaxers ever. I colored it maybe twice a year but nothing super drastic. What can I do to improve my hair? What am I doing wrong? 

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