Interesting that you viewed the book as having negative portrayals. I read it myself and thought it was the opposite in fact. I don't think that description you highlight was in any way done so in the book to be negative.I have a problem with this book, e.g. how it portrays someone who wears large bulky headphones to the grocery store, because they can't tolerate the noise there. It looks down on sensory issues. The tone is as if you were worse if you have sensory issues. It's so inclusive that it excludes people who have legitimate issues.
I also have a problem how it is really about negative self-esteem and doesn't offer any insight about autism and how to deal with it. There is a lot of talk about self-esteem, none about autism itself. Anyone woth or without autism can have the experiences described in this book. I'm very sorry for what the author went through and it must have been awful to be a lonly young person who is a people pleaser and has anxiety and depression, however, lots of people have the same issues and it doesn't have to be exclusively autism. Most often than not, it's not. There are also other kinds of neurodoversity such as ADHD that I think are blended in in the book and called autism. I see ADHD as a legitimate problem and experiences of people with it as hard, valid and potentially isolating as well, but it's not the same thing as autism.
I can't relate to the book at all and it feels alienating and even speaks unfavourably about what I'm like. I am the science guy and I do wear bulky headphones to grocery shops and make poor eye contact - that isn't even a negative thing, but I got to know from this boom that it is.
I have nothing but good to say about the author and the book in general. It's thorough, well sourced, well explained. For someone newly delving into the vast amount of information on the topic I thought this book to be invaluable in explaining masking and the harms that come from it. Especially as I had been unknowingly masking for most of my life.