I would put flopping (on par with some of the worst in soccer), offensive charging fouls that aren't called, and perhaps the most biased refereeing in all of pro-sports at the top of the list.
I quit watching after seeing one dribble at half-court and four steps to the basket ... and no traveling calls!
“perhaps the most biased refereeing in all of pro-sports at the top of the list.”
Come on, professional wrestling is worse (if only by a little bit.)
I might have played in the NBA if I would have had the ability to dunk the ball without walking from the free throw line and been able to get a fouled called every time I missed a shot.