For some reason, Devin Booker seems to draw a lot of criticism especially from non-local media and non-Suns fans. He also gets some from the Phoenix faithful but that tends to be more measured and grounded in fact rather than hyperbole and a lack of familiarity with the Suns as a whole in my opinion.
Booker’s lack of defensive prowess is well known and entirely deserving of criticism but pretty much everything else is overblown, often due to a lack of familiarity with the Suns in general. The one that I have the biggest issue with is that he hasn’t been able to carry the Suns to more wins and/or on to the playoffs.