This book is good apart from the blatant fatphobia, ableism, homophobia ect.
I initially enjoyed it but paragraphs about the main characters horrible views ruined it. There are other ways than insulting minority groups to get across your point that the main character is a bad person. 
It had multiple bits saying how most influencers fake disability or mental illness for views and individuality which is disgusting but sadly something that most people seem to believe.  
It also has instances body shaming characters and it wasn't just veiled comments but full out paragraphs about how "disgusting" it was that they enjoyed themselves when they had acne or were fat. (Obviously this isn't true your body fine the way it is.)
And at least one homophobic bit where the main character was saying that another character labeled themselves as pansexual but had only dated men then giving their opinion that they can't have been pansexual because they only have dated men. (This isn't true most people only realise later in life that they like other genders so it's entirely reasonable.)
Conclusion: Read it if you like but understand that the book has many harmful views in it.