I had four different therapists throughout my life. None of them mentioned ADHD. Got diagnosed by a psychiatrist a few years later.Hasn't she been seeing a therapist in, like, forever? Why didn't the therapist pick up on potential ADHD? Surely it would be obvious to a qualified therapist.
I think Helen is desperate for a diagnosis of something to blame all her issues on rather than looking at her behaviours and thoughts. With a diagnosis she can just excuse everything and continue to be a dick. "My adhd made me do it!"
Also it's true that you shouldn't worry about what others think but that shouldn't stop you checking yourself regularly to make sure you're not doing or saying anything that could hurt yourself or others. Especially when you choose to put yourself and your thoughts out there!
As for her weight I've seen her irl and wouldn't put her any higher than a size 18.