There's nothing really 'wrong' about this book - it just lacks substance. The author is just telling you to take better care of yourself, chase your dreams etc without actually helping get you started. It's just inspo porn which - maybe that's what people want but in my experience it just leaves you in the same place you started in. 

She also consistently seems to forget that she's having all her basic needs met and not everyone has that. And for a person that wrote an entire chapter about realising her privilege, she seems to forget that she has it sometimes. There's also no sourcing at all - so sometimes she just drops a 'fact', like that porn is bad for everyone involved, that leaves you wondering what her evidence for that is.