Several of the busts were in the era when so many GMs fell in love with drafting kids right out of high school.
The Bulls had even split of bad luck and bad picks. Scott May was on the undefeated Indiana team, came in after the Dick Motta contending teams were broken up. Had he not been injured he was probably on his way to being a solid unspectacular NBA player but not more. Greenwood is not a bust as much as a good complimentary player on a bad team. Had he been on a good team he would have been like say Charles Oakley or Horace Grant but he couldn't be one of the key players he needed to be. His fate was sealed when the Bulls lost the coin flip for the first pick and the Lakers ended up with Magic Johnson. Stew on that one for a few decades and get back to me. I genuinely believe that Jay Williams would have become an all star level player. He didn't play much early in the year and had trouble adjusting to the NBA game but by the end of the year he was on his game. But of course he was an idiot on a motorcycle in the city and that was that,
Steve Stipanovich was a 6-11 center with a good outside shot who was in line to be the second coming of Jack Sikma. Except he wasn't very strong, never could rebound and was a bust. David Meyers was a UCLA forward on great teams, too small but almost strong enough to be a 4, too slow and couldn't shoot well enough to be a 3. Ended up like another UCLA player Greenwood good but never great. Otis Birdsong, great before he got hurt which he did continually and then never the same. Marvin Barnes, mostly ABA where the nickname Bad News was perfectly suited, more off the court troubles than big games.
Darrell Griffith out of Louisville was a spectacular 6-4 dunking guard, DR. Dunkenstein. Had a pretty good NBA career that went unnoticed playing in Utah on below 500 teams.