Trae Young had an all-time meltdown late in the Atlanta Hawks' loss to the Orlando Magic in the Play-In Tournament on Tuesday ... and his antics that resulted in getting booted from the game were criticized by officials after the loss -- with a ref claiming the guard was "making a mockery of the game."
Young -- who had 28 points in the 120-95 defeat -- grew increasingly pissed over officiating in the contest ... and with 4:47 left before the final buzzer, he reached his breaking point.