"Regardless of if he (Jaylen Brown) gets traded or not, this ENTIRE thing is a DISASTER" WHO IS TO BLAME??

"Regardless of if he (Jaylen Brown) gets traded or not, this ENTIRE thing is a DISASTER" WHO IS TO BLAME?? Scheim: "It has to be Brad Stevens"
Is this Brad Stevens' biggest misstep? If so, is it his first misstep?