When my hair was similar, apart from weeding out medical causes...none!... I was left to sift through a myriad of very helpful advice. I took away these two pieces: Olaplex...and, I feel, coupled with it,the thing that worked, and still does, is the fact that I religiously sleep on silk. I toss and turn throughout the night and the friction that it caused made me look not too dissimilar to Rick Mayall in 'Drop Dead, Fred'!
The silk calms the static, which stops the hair from 'tatting' .
I know others have mentioned sleeping on silk, I just wanted to reiterate to you that,for me,at least, it really works.