As someone who deals with this, I thought the depiction was really good. I haven't had thoughts like "you're worthless" or "pulling hair is the only thing you know how to do", and I don't do it out of frustration, but in general, I thought the portrayal of 'the voice inside your head' and the thoughts that come from it were super accurate.
I also liked how as you go on the hairs get scarcer and scarcer because it reminds me a bit of what my shins look like - multiple bald patches and lots of blunt ends.
I thought this was great and hope more people take a look at this.